Merge pull request #28954 from frenzibyte/fix-pause-input-handling

Fix held gameplay keys stuck after pausing and resuming
Merge branch 'master' into fix-pause-input-handling
2026-05-18 02:49:53 +08:00 · 2024-07-20 15:45:19 +09:00 · 2024-07-20 15:23:34 +09:00 · 2024-07-20 15:23:21 +09:00 · 2024-07-20 14:08:00 +09:00 · 2024-07-19 19:19:36 +03:00
1050 changed files with 34701 additions and 9907 deletions
@@ -21,7 +21,7 @@
      ]
    },
    "ppy.localisationanalyser.tools": {
-      "version": "2023.1117.0",
+      "version": "2024.517.0",
      "commands": [
        "localisation"
      ]
@@ -196,6 +196,9 @@ csharp_style_prefer_switch_expression = false:none

 csharp_style_namespace_declarations = block_scoped:warning

+#Style - C# 12 features
+csharp_style_prefer_primary_constructors = false
+
 [*.{yaml,yml}]
 insert_final_newline = true
 indent_style = space
@@ -13,10 +13,10 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4

      - name: Install .NET 8.0.x
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: "8.0.x"

@@ -27,7 +27,7 @@ jobs:
        run: dotnet restore osu.Desktop.slnf

      - name: Restore inspectcode cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
        with:
          path: ${{ github.workspace }}/inspectcode
          key: inspectcode-${{ hashFiles('.config/dotnet-tools.json', '.github/workflows/ci.yml', 'osu.sln*', 'osu*.slnf', '.editorconfig', '.globalconfig', 'CodeAnalysis/*', '**/*.csproj', '**/*.props') }}
@@ -67,13 +67,13 @@ jobs:
            - { prettyname: macOS, fullname: macos-latest }
            - { prettyname: Linux, fullname: ubuntu-latest }
          threadingMode: ['SingleThread', 'MultiThreaded']
-    timeout-minutes: 60
+    timeout-minutes: 120
    steps:
      - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4

      - name: Install .NET 8.0.x
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: "8.0.x"

@@ -99,16 +99,16 @@ jobs:
    timeout-minutes: 60
    steps:
      - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4

      - name: Setup JDK 11
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
        with:
          distribution: microsoft
          java-version: 11

      - name: Install .NET 8.0.x
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: "8.0.x"

@@ -126,10 +126,10 @@ jobs:
    timeout-minutes: 60
    steps:
      - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4

      - name: Install .NET 8.0.x
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: "8.0.x"

@@ -110,10 +110,14 @@ jobs:
    if: ${{ github.event_name == 'workflow_dispatch' || contains(github.event.comment.body, '!diffcalc') }}
    steps:
      - name: Check permissions
-        if: ${{ github.event_name != 'workflow_dispatch' }}
-        uses: actions-cool/check-user-permission@a0668c9aec87f3875fc56170b6452a453e9dd819 # v2.2.0
-        with:
-          require: 'write'
+        run: |
+          ALLOWED_USERS=(smoogipoo peppy bdach frenzibyte)
+          for i in "${ALLOWED_USERS[@]}"; do
+              if [[ "${{ github.actor }}" == "$i" ]]; then
+                  exit 0
+              fi
+          done
+          exit 1

  create-comment:
    name: Create PR comment
@@ -122,7 +126,7 @@ jobs:
    if: ${{ github.event_name == 'issue_comment' && github.event.issue.pull_request }}
    steps:
      - name: Create comment
-        uses: thollander/actions-comment-pull-request@363c6f6eae92cc5c3a66e95ba016fc771bb38943 # v2.4.2
+        uses: thollander/actions-comment-pull-request@fabd468d3a1a0b97feee5f6b9e499eab0dd903f6 # v2.5.0
        with:
          comment_tag: ${{ env.EXECUTION_ID }}
          message: |
@@ -140,7 +144,7 @@ jobs:
      GOOGLE_CREDS_FILE: ${{ steps.set-outputs.outputs.GOOGLE_CREDS_FILE }}
    steps:
      - name: Checkout diffcalc-sheet-generator
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
        with:
          path: ${{ env.EXECUTION_ID }}
          repository: 'smoogipoo/diffcalc-sheet-generator'
@@ -249,7 +253,7 @@ jobs:

      - name: Restore cache
        id: restore-cache
-        uses: maxnowack/local-cache@038cc090b52e4f205fbc468bf5b0756df6f68775 # v1
+        uses: maxnowack/local-cache@720e69c948191660a90aa1cf6a42fc4d2dacdf30 # v2
        with:
          path: ${{ steps.query.outputs.DATA_NAME }}.tar.bz2
          key: ${{ steps.query.outputs.DATA_NAME }}
@@ -280,7 +284,7 @@ jobs:

      - name: Restore cache
        id: restore-cache
-        uses: maxnowack/local-cache@038cc090b52e4f205fbc468bf5b0756df6f68775 # v1
+        uses: maxnowack/local-cache@720e69c948191660a90aa1cf6a42fc4d2dacdf30 # v2
        with:
          path: ${{ steps.query.outputs.DATA_NAME }}.tar.bz2
          key: ${{ steps.query.outputs.DATA_NAME }}
@@ -354,7 +358,7 @@ jobs:
    steps:
      - name: Update comment on success
        if: ${{ needs.generator.result == 'success' }}
-        uses: thollander/actions-comment-pull-request@363c6f6eae92cc5c3a66e95ba016fc771bb38943 # v2.4.2
+        uses: thollander/actions-comment-pull-request@fabd468d3a1a0b97feee5f6b9e499eab0dd903f6 # v2.5.0
        with:
          comment_tag: ${{ env.EXECUTION_ID }}
          mode: upsert
@@ -365,7 +369,7 @@ jobs:

      - name: Update comment on failure
        if: ${{ needs.generator.result == 'failure' }}
-        uses: thollander/actions-comment-pull-request@363c6f6eae92cc5c3a66e95ba016fc771bb38943 # v2.4.2
+        uses: thollander/actions-comment-pull-request@fabd468d3a1a0b97feee5f6b9e499eab0dd903f6 # v2.5.0
        with:
          comment_tag: ${{ env.EXECUTION_ID }}
          mode: upsert
@@ -375,7 +379,7 @@ jobs:

      - name: Update comment on cancellation
        if: ${{ needs.generator.result == 'cancelled' }}
-        uses: thollander/actions-comment-pull-request@363c6f6eae92cc5c3a66e95ba016fc771bb38943 # v2.4.2
+        uses: thollander/actions-comment-pull-request@fabd468d3a1a0b97feee5f6b9e499eab0dd903f6 # v2.5.0
        with:
          comment_tag: ${{ env.EXECUTION_ID }}
          mode: delete
@@ -28,7 +28,7 @@ jobs:
    timeout-minutes: 5
    steps:
      - name: Annotate CI run with test results
-        uses: dorny/test-reporter@v1.6.0
+        uses: dorny/test-reporter@v1.8.0
        with:
          artifact: osu-test-results-${{matrix.os.prettyname}}-${{matrix.threadingMode}}
          name: Test Results (${{matrix.os.prettyname}}, ${{matrix.threadingMode}})
@@ -13,7 +13,7 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
        with:
          fetch-depth: 0

@@ -13,23 +13,23 @@ jobs:
    runs-on: ubuntu-latest
    steps:
    - name: Install .NET 8.0.x
-      uses: actions/setup-dotnet@v3
+      uses: actions/setup-dotnet@v4
      with:
        dotnet-version: "8.0.x"

    - name: Checkout ppy/osu
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
      with:
        path: osu

    - name: Checkout ppy/osu-tools
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
      with:
        repository: ppy/osu-tools
        path: osu-tools

    - name: Checkout ppy/osu-web
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
      with:
        repository: ppy/osu-web
        path: osu-web
@@ -43,7 +43,7 @@ jobs:
      working-directory: ./osu-tools

    - name: Create pull request with changes
-      uses: peter-evans/create-pull-request@v5
+      uses: peter-evans/create-pull-request@v6
      with:
        title: Update mod definitions
        body: "This PR has been auto-generated to update the mod definitions to match ppy/osu@${{ github.ref_name }}."
@@ -265,6 +265,8 @@ __pycache__/
 .idea/**/usage.statistics.xml
 .idea/**/dictionaries
 .idea/**/shelf
+.idea/*/.idea/projectSettingsUpdater.xml
+.idea/*/.idea/encodings.xml

 # Generated files
 .idea/**/contentModel.xml
@@ -340,4 +342,5 @@ inspectcode
 # Fody (pulled in by Realm) - schema file
 FodyWeavers.xsd

-.idea/.idea.osu.Desktop/.idea/misc.xml
+.idea/.idea.osu.Desktop/.idea/misc.xml
+.idea/.idea.osu.Android/.idea/deploymentTargetDropDown.xml
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RiderProjectSettingsUpdater">
-    <option name="vcsConfiguration" value="2" />
-  </component>
-</project>
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
-</project>
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RiderProjectSettingsUpdater">
-    <option name="vcsConfiguration" value="2" />
-  </component>
-</project>
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RiderProjectSettingsUpdater">
-    <option name="vcsConfiguration" value="2" />
-  </component>
-</project>
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RiderProjectSettingsUpdater">
-    <option name="vcsConfiguration" value="2" />
-  </component>
-</project>
@@ -7,7 +7,6 @@ T:SixLabors.ImageSharp.IDeepCloneable`1;Use osu.Game.Utils.IDeepCloneable<T> ins
 M:osu.Framework.Graphics.Sprites.SpriteText.#ctor;Use OsuSpriteText.
 M:osu.Framework.Bindables.IBindableList`1.GetBoundCopy();Fails on iOS. Use manual ctor + BindTo instead. (see https://github.com/mono/mono/issues/19900)
 T:NuGet.Packaging.CollectionExtensions;Don't use internal extension methods.
-M:System.Enum.HasFlag(System.Enum);Use osu.Framework.Extensions.EnumExtensions.HasFlagFast<T>() instead.
 M:Realms.IRealmCollection`1.SubscribeForNotifications`1(Realms.NotificationCallbackDelegate{``0});Use osu.Game.Database.RealmObjectExtensions.QueryAsyncWithNotifications(IRealmCollection<T>,NotificationCallbackDelegate<T>) instead.
 M:System.Guid.#ctor;Probably meaning to use Guid.NewGuid() instead. If actually wanting empty, use Guid.Empty.
 M:Realms.CollectionExtensions.SubscribeForNotifications`1(System.Linq.IQueryable{``0},Realms.NotificationCallbackDelegate{``0});Use osu.Game.Database.RealmObjectExtensions.QueryAsyncWithNotifications(IQueryable<T>,NotificationCallbackDelegate<T>) instead.
@@ -2,7 +2,6 @@
 <Project>
  <PropertyGroup Label="C#">
    <LangVersion>12.0</LangVersion>
-    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
    <Nullable>enable</Nullable>
  </PropertyGroup>
  <PropertyGroup>
@@ -10,7 +10,7 @@
    <EmbedAssembliesIntoApk>true</EmbedAssembliesIntoApk>
  </PropertyGroup>
  <ItemGroup>
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2024.217.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2024.720.0" />
  </ItemGroup>
  <PropertyGroup>
    <!-- Fody does not handle Android build well, and warns when unchanged.
@@ -1,76 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-using osu.Framework.Allocation;
-using osu.Framework.Android.Input;
-using osu.Framework.Bindables;
-using osu.Framework.Graphics;
-using osu.Framework.Localisation;
-using osu.Game.Localisation;
-using osu.Game.Overlays.Settings;
-
-namespace osu.Android
-{
-    public partial class AndroidJoystickSettings : SettingsSubsection
-    {
-        protected override LocalisableString Header => JoystickSettingsStrings.JoystickGamepad;
-
-        private readonly AndroidJoystickHandler joystickHandler;
-
-        private readonly Bindable<bool> enabled = new BindableBool(true);
-
-        private SettingsSlider<float> deadzoneSlider = null!;
-
-        private Bindable<float> handlerDeadzone = null!;
-
-        private Bindable<float> localDeadzone = null!;
-
-        public AndroidJoystickSettings(AndroidJoystickHandler joystickHandler)
-        {
-            this.joystickHandler = joystickHandler;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-            // use local bindable to avoid changing enabled state of game host's bindable.
-            handlerDeadzone = joystickHandler.DeadzoneThreshold.GetBoundCopy();
-            localDeadzone = handlerDeadzone.GetUnboundCopy();
-
-            Children = new Drawable[]
-            {
-                new SettingsCheckbox
-                {
-                    LabelText = CommonStrings.Enabled,
-                    Current = enabled
-                },
-                deadzoneSlider = new SettingsSlider<float>
-                {
-                    LabelText = JoystickSettingsStrings.DeadzoneThreshold,
-                    KeyboardStep = 0.01f,
-                    DisplayAsPercentage = true,
-                    Current = localDeadzone,
-                },
-            };
-        }
-
-        protected override void LoadComplete()
-        {
-            base.LoadComplete();
-
-            enabled.BindTo(joystickHandler.Enabled);
-            enabled.BindValueChanged(e => deadzoneSlider.Current.Disabled = !e.NewValue, true);
-
-            handlerDeadzone.BindValueChanged(val =>
-            {
-                bool disabled = localDeadzone.Disabled;
-
-                localDeadzone.Disabled = false;
-                localDeadzone.Value = val.NewValue;
-                localDeadzone.Disabled = disabled;
-            }, true);
-
-            localDeadzone.BindValueChanged(val => handlerDeadzone.Value = val.NewValue);
-        }
-    }
-}
@@ -1,97 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-using Android.OS;
-using osu.Framework.Allocation;
-using osu.Framework.Android.Input;
-using osu.Framework.Bindables;
-using osu.Framework.Graphics;
-using osu.Framework.Localisation;
-using osu.Game.Configuration;
-using osu.Game.Localisation;
-using osu.Game.Overlays.Settings;
-using osu.Game.Overlays.Settings.Sections.Input;
-
-namespace osu.Android
-{
-    public partial class AndroidMouseSettings : SettingsSubsection
-    {
-        private readonly AndroidMouseHandler mouseHandler;
-
-        protected override LocalisableString Header => MouseSettingsStrings.Mouse;
-
-        private Bindable<double> handlerSensitivity = null!;
-
-        private Bindable<double> localSensitivity = null!;
-
-        private Bindable<bool> relativeMode = null!;
-
-        public AndroidMouseSettings(AndroidMouseHandler mouseHandler)
-        {
-            this.mouseHandler = mouseHandler;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load(OsuConfigManager osuConfig)
-        {
-            // use local bindable to avoid changing enabled state of game host's bindable.
-            handlerSensitivity = mouseHandler.Sensitivity.GetBoundCopy();
-            localSensitivity = handlerSensitivity.GetUnboundCopy();
-
-            relativeMode = mouseHandler.UseRelativeMode.GetBoundCopy();
-
-            // High precision/pointer capture is only available on Android 8.0 and up
-            if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
-            {
-                AddRange(new Drawable[]
-                {
-                    new SettingsCheckbox
-                    {
-                        LabelText = MouseSettingsStrings.HighPrecisionMouse,
-                        TooltipText = MouseSettingsStrings.HighPrecisionMouseTooltip,
-                        Current = relativeMode,
-                        Keywords = new[] { @"raw", @"input", @"relative", @"cursor", @"captured", @"pointer" },
-                    },
-                    new MouseSettings.SensitivitySetting
-                    {
-                        LabelText = MouseSettingsStrings.CursorSensitivity,
-                        Current = localSensitivity,
-                    },
-                });
-            }
-
-            AddRange(new Drawable[]
-            {
-                new SettingsCheckbox
-                {
-                    LabelText = MouseSettingsStrings.DisableMouseWheelVolumeAdjust,
-                    TooltipText = MouseSettingsStrings.DisableMouseWheelVolumeAdjustTooltip,
-                    Current = osuConfig.GetBindable<bool>(OsuSetting.MouseDisableWheel),
-                },
-                new SettingsCheckbox
-                {
-                    LabelText = MouseSettingsStrings.DisableClicksDuringGameplay,
-                    Current = osuConfig.GetBindable<bool>(OsuSetting.MouseDisableButtons),
-                },
-            });
-        }
-
-        protected override void LoadComplete()
-        {
-            base.LoadComplete();
-
-            relativeMode.BindValueChanged(relative => localSensitivity.Disabled = !relative.NewValue, true);
-
-            handlerSensitivity.BindValueChanged(val =>
-            {
-                bool disabled = localSensitivity.Disabled;
-
-                localSensitivity.Disabled = false;
-                localSensitivity.Value = val.NewValue;
-                localSensitivity.Disabled = disabled;
-            }, true);
-
-            localSensitivity.BindValueChanged(val => handlerSensitivity.Value = val.NewValue);
-        }
-    }
-}
@@ -5,13 +5,9 @@ using System;
 using Android.App;
 using Microsoft.Maui.Devices;
 using osu.Framework.Allocation;
-using osu.Framework.Android.Input;
 using osu.Framework.Extensions.ObjectExtensions;
-using osu.Framework.Input.Handlers;
 using osu.Framework.Platform;
 using osu.Game;
-using osu.Game.Overlays.Settings;
-using osu.Game.Overlays.Settings.Sections.Input;
 using osu.Game.Updater;
 using osu.Game.Utils;

@@ -88,24 +84,6 @@ namespace osu.Android

        protected override BatteryInfo CreateBatteryInfo() => new AndroidBatteryInfo();

-        public override SettingsSubsection CreateSettingsSubsectionFor(InputHandler handler)
-        {
-            switch (handler)
-            {
-                case AndroidMouseHandler mh:
-                    return new AndroidMouseSettings(mh);
-
-                case AndroidJoystickHandler jh:
-                    return new AndroidJoystickSettings(jh);
-
-                case AndroidTouchHandler th:
-                    return new TouchSettings(th);
-
-                default:
-                    return base.CreateSettingsSubsectionFor(handler);
-            }
-        }
-
        private class AndroidBatteryInfo : BatteryInfo
        {
            public override double? ChargeLevel => Battery.ChargeLevel;
@@ -1,24 +1,8 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
-    android:height="108dp"
-    android:viewportWidth="108"
-    android:viewportHeight="108">
-  <path
-      android:pathData="M73.92,44.43C74.82,44.43 75.43,45.1 75.43,46.02V54.54C75.43,55.46 74.82,56.13 73.92,56.13C73,56.13 72.41,55.46 72.41,54.54V46.02C72.41,45.1 73,44.43 73.92,44.43ZM73.92,61.55C72.82,61.55 71.95,60.68 71.95,59.58C71.95,58.51 72.82,57.64 73.92,57.64C75.02,57.64 75.89,58.51 75.89,59.58C75.89,60.68 75.02,61.55 73.92,61.55Z"
-      android:fillColor="#000000"/>
-  <path
-      android:pathData="M68.41,48.55C69.33,48.55 69.92,49.22 69.92,50.11V55.77C69.92,59.94 67.35,61.55 64.22,61.55C61.08,61.55 58.5,59.94 58.5,55.77V50.11C58.5,49.22 59.09,48.55 60.01,48.55C60.91,48.55 61.52,49.22 61.52,50.11V55.56C61.52,57.84 62.48,58.74 64.22,58.74C65.94,58.74 66.9,57.84 66.9,55.56V50.11C66.9,49.22 67.51,48.55 68.41,48.55Z"
-      android:fillColor="#000000"/>
-  <path
-      android:pathData="M49.94,52.01C49.94,52.85 50.81,53.16 52.47,53.54C54.78,54.1 56.98,54.69 56.98,57.53C56.98,60.3 54.93,61.55 51.99,61.55C49.56,61.55 47.79,60.71 46.97,59.73C46.33,58.97 46.41,58.3 47.02,57.71C47.79,56.97 48.46,57.28 48.89,57.66C49.58,58.3 50.43,58.97 52.07,58.97C53.29,58.97 54.06,58.56 54.06,57.74C54.06,56.92 53.24,56.64 51.09,56.05C48.97,55.46 47.08,54.9 47.08,52.36C47.08,49.52 49.38,48.35 51.94,48.35C53.4,48.35 55.06,48.73 56.08,49.83C56.52,50.27 56.85,50.88 56.08,51.72C55.32,52.52 54.75,52.29 54.22,51.88C53.73,51.52 52.88,50.91 51.6,50.91C50.73,50.91 49.94,51.19 49.94,52.01Z"
-      android:fillColor="#000000"/>
-  <path
-      android:pathData="M38.79,61.55C34.9,61.55 32.11,58.74 32.11,54.95C32.11,51.14 34.9,48.35 38.79,48.35C42.68,48.35 45.47,51.14 45.47,54.95C45.47,58.74 42.68,61.55 38.79,61.55ZM38.79,58.74C41.04,58.74 42.45,57.1 42.45,54.95C42.45,52.8 41.04,51.14 38.79,51.14C36.54,51.14 35.13,52.8 35.13,54.95C35.13,57.1 36.54,58.74 38.79,58.74Z"
-      android:fillColor="#000000"/>
-  <path
-      android:pathData="M86,54C86,71.67 71.67,86 54,86C36.33,86 22,71.67 22,54C22,36.33 36.33,22 54,22C71.67,22 86,36.33 86,54ZM25.2,54C25.2,69.91 38.09,82.8 54,82.8C69.91,82.8 82.8,69.91 82.8,54C82.8,38.09 69.91,25.2 54,25.2C38.09,25.2 25.2,38.09 25.2,54Z"
-      android:fillColor="#000000"/>
-  <path
-      android:pathData="M36.78,54.99C36.78,56.09 37.65,56.96 38.75,56.96C39.85,56.96 40.72,56.09 40.72,54.99C40.72,53.91 39.85,53.04 38.75,53.04C37.65,53.04 36.78,53.91 36.78,54.99Z"
-      android:fillColor="#000000"/>
+<vector android:height="108dp" android:viewportHeight="434"
+    android:viewportWidth="434" android:width="108dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#000000" android:pathData="M299.36,178.05C303.08,178.05 305.62,180.81 305.62,184.62V219.92C305.62,223.74 303.08,226.5 299.36,226.5C295.55,226.5 293.11,223.74 293.11,219.92V184.62C293.11,180.81 295.55,178.05 299.36,178.05ZM299.36,248.97C294.81,248.97 291.2,245.37 291.2,240.81C291.2,236.35 294.81,232.75 299.36,232.75C303.92,232.75 307.53,236.35 307.53,240.81C307.53,245.37 303.92,248.97 299.36,248.97Z"/>
+    <path android:fillColor="#000000" android:pathData="M276.52,195.12C280.34,195.12 282.77,197.87 282.77,201.58V225.01C282.77,242.29 272.12,248.97 259.19,248.97C246.15,248.97 235.49,242.29 235.49,225.01V201.58C235.49,197.87 237.93,195.12 241.75,195.12C245.46,195.12 248,197.87 248,201.58V224.16C248,233.6 251.98,237.31 259.19,237.31C266.29,237.31 270.27,233.6 270.27,224.16V201.58C270.27,197.87 272.81,195.12 276.52,195.12Z"/>
+    <path android:fillColor="#000000" android:pathData="M200.02,209.43C200.02,212.93 203.63,214.2 210.52,215.79C220.06,218.12 229.18,220.56 229.18,232.33C229.18,243.78 220.7,248.97 208.51,248.97C198.43,248.97 191.12,245.47 187.73,241.44C185.08,238.26 185.4,235.51 187.94,233.07C191.12,229.99 193.88,231.27 195.68,232.86C198.54,235.51 202.04,238.26 208.82,238.26C213.91,238.26 217.09,236.57 217.09,233.18C217.09,229.78 213.7,228.62 204.8,226.18C196,223.74 188.15,221.41 188.15,210.91C188.15,199.15 197.69,194.27 208.29,194.27C214.34,194.27 221.23,195.86 225.47,200.42C227.27,202.22 228.65,204.76 225.47,208.26C222.29,211.55 219.96,210.6 217.73,208.9C215.71,207.41 212.22,204.87 206.92,204.87C203.31,204.87 200.02,206.04 200.02,209.43Z"/>
+    <path android:fillColor="#000000" android:pathData="M153.74,248.97C138.46,248.97 127.5,237.27 127.5,221.53C127.5,205.68 138.46,194.09 153.74,194.09C169.03,194.09 179.99,205.68 179.99,221.53C179.99,237.27 169.03,248.97 153.74,248.97ZM153.74,237.27C162.59,237.27 168.12,230.46 168.12,221.53C168.12,212.6 162.59,205.68 153.74,205.68C144.89,205.68 139.36,212.6 139.36,221.53C139.36,230.46 144.89,237.27 153.74,237.27Z"/>
+    <path android:fillColor="#000000" android:pathData="M349,217.5C349,290.13 290.13,349 217.5,349C144.88,349 86,290.13 86,217.5C86,144.88 144.88,86 217.5,86C290.13,86 349,144.88 349,217.5ZM99.15,217.5C99.15,282.86 152.14,335.85 217.5,335.85C282.86,335.85 335.85,282.86 335.85,217.5C335.85,152.14 282.86,99.15 217.5,99.15C152.14,99.15 99.15,152.14 99.15,217.5Z"/>
 </vector>
@@ -5,14 +5,21 @@ using System;
 using System.Text;
 using DiscordRPC;
 using DiscordRPC.Message;
+using Newtonsoft.Json;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
+using osu.Framework.Extensions.ObjectExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Logging;
+using osu.Framework.Threading;
+using osu.Game;
 using osu.Game.Configuration;
 using osu.Game.Extensions;
 using osu.Game.Online.API;
 using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Online.Multiplayer;
+using osu.Game.Online.Rooms;
+using osu.Game.Overlays;
 using osu.Game.Rulesets;
 using osu.Game.Users;
 using LogLevel = osu.Framework.Logging.LogLevel;
@@ -21,39 +28,78 @@ namespace osu.Desktop
 {
    internal partial class DiscordRichPresence : Component
    {
-        private const string client_id = "367827983903490050";
+        private const string client_id = "1216669957799018608";

        private DiscordRpcClient client = null!;

        [Resolved]
        private IBindable<RulesetInfo> ruleset { get; set; } = null!;

-        private IBindable<APIUser> user = null!;
-
        [Resolved]
        private IAPIProvider api { get; set; } = null!;

+        [Resolved]
+        private OsuGame game { get; set; } = null!;
+
+        [Resolved]
+        private LoginOverlay? login { get; set; }
+
+        [Resolved]
+        private MultiplayerClient multiplayerClient { get; set; } = null!;
+
+        [Resolved]
+        private OsuConfigManager config { get; set; } = null!;
+
        private readonly IBindable<UserStatus?> status = new Bindable<UserStatus?>();
        private readonly IBindable<UserActivity> activity = new Bindable<UserActivity>();
-
        private readonly Bindable<DiscordRichPresenceMode> privacyMode = new Bindable<DiscordRichPresenceMode>();

        private readonly RichPresence presence = new RichPresence
        {
-            Assets = new Assets { LargeImageKey = "osu_logo_lazer", }
+            Assets = new Assets { LargeImageKey = "osu_logo_lazer" },
+            Secrets = new Secrets
+            {
+                JoinSecret = null,
+                SpectateSecret = null,
+            },
        };

+        private IBindable<APIUser>? user;
+
        [BackgroundDependencyLoader]
-        private void load(OsuConfigManager config)
+        private void load()
        {
            client = new DiscordRpcClient(client_id)
            {
-                SkipIdenticalPresence = false // handles better on discord IPC loss, see updateStatus call in onReady.
+                // SkipIdenticalPresence allows us to fire SetPresence at any point and leave it to the underlying implementation
+                // to check whether a difference has actually occurred before sending a command to Discord (with a minor caveat that's handled in onReady).
+                SkipIdenticalPresence = true
            };

            client.OnReady += onReady;
+            client.OnError += (_, e) => Logger.Log($"An error occurred with Discord RPC Client: {e.Message} ({e.Code})", LoggingTarget.Network, LogLevel.Error);

-            client.OnError += (_, e) => Logger.Log($"An error occurred with Discord RPC Client: {e.Code} {e.Message}", LoggingTarget.Network);
+            try
+            {
+                client.RegisterUriScheme();
+                client.Subscribe(EventType.Join);
+                client.OnJoin += onJoin;
+            }
+            catch (Exception ex)
+            {
+                // This is known to fail in at least the following sandboxed environments:
+                // - macOS (when packaged as an app bundle)
+                // - flatpak (see: https://github.com/flathub/sh.ppy.osu/issues/170)
+                // There is currently no better way to do this offered by Discord, so the best we can do is simply ignore it for now.
+                Logger.Log($"Failed to register Discord URI scheme: {ex}");
+            }
+
+            client.Initialize();
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();

            config.BindWith(OsuSetting.DiscordRichPresence, privacyMode);

@@ -67,36 +113,59 @@ namespace osu.Desktop
                activity.BindTo(u.NewValue.Activity);
            }, true);

-            ruleset.BindValueChanged(_ => updateStatus());
-            status.BindValueChanged(_ => updateStatus());
-            activity.BindValueChanged(_ => updateStatus());
-            privacyMode.BindValueChanged(_ => updateStatus());
-
-            client.Initialize();
+            ruleset.BindValueChanged(_ => schedulePresenceUpdate());
+            status.BindValueChanged(_ => schedulePresenceUpdate());
+            activity.BindValueChanged(_ => schedulePresenceUpdate());
+            privacyMode.BindValueChanged(_ => schedulePresenceUpdate());
+            multiplayerClient.RoomUpdated += onRoomUpdated;
        }

        private void onReady(object _, ReadyMessage __)
        {
            Logger.Log("Discord RPC Client ready.", LoggingTarget.Network, LogLevel.Debug);
-            updateStatus();
+
+            // when RPC is lost and reconnected, we have to clear presence state for updatePresence to work (see DiscordRpcClient.SkipIdenticalPresence).
+            if (client.CurrentPresence != null)
+                client.SetPresence(null);
+
+            schedulePresenceUpdate();
        }

-        private void updateStatus()
+        private void onRoomUpdated() => schedulePresenceUpdate();
+
+        private ScheduledDelegate? presenceUpdateDelegate;
+
+        private void schedulePresenceUpdate()
        {
-            if (!client.IsInitialized)
+            presenceUpdateDelegate?.Cancel();
+            presenceUpdateDelegate = Scheduler.AddDelayed(() =>
+            {
+                if (!client.IsInitialized)
+                    return;
+
+                if (status.Value == UserStatus.Offline || privacyMode.Value == DiscordRichPresenceMode.Off)
+                {
+                    client.ClearPresence();
+                    return;
+                }
+
+                bool hideIdentifiableInformation = privacyMode.Value == DiscordRichPresenceMode.Limited || status.Value == UserStatus.DoNotDisturb;
+
+                updatePresence(hideIdentifiableInformation);
+                client.SetPresence(presence);
+            }, 200);
+        }
+
+        private void updatePresence(bool hideIdentifiableInformation)
+        {
+            if (user == null)
                return;

-            if (status.Value == UserStatus.Offline || privacyMode.Value == DiscordRichPresenceMode.Off)
+            // user activity
+            if (activity.Value != null)
            {
-                client.ClearPresence();
-                return;
-            }
-
-            if (status.Value == UserStatus.Online && activity.Value != null)
-            {
-                bool hideIdentifiableInformation = privacyMode.Value == DiscordRichPresenceMode.Limited;
-                presence.State = truncate(activity.Value.GetStatus(hideIdentifiableInformation));
-                presence.Details = truncate(activity.Value.GetDetails(hideIdentifiableInformation) ?? string.Empty);
+                presence.State = clampLength(activity.Value.GetStatus(hideIdentifiableInformation));
+                presence.Details = clampLength(activity.Value.GetDetails(hideIdentifiableInformation) ?? string.Empty);

                if (getBeatmapID(activity.Value) is int beatmapId && beatmapId > 0)
                {
@@ -120,7 +189,42 @@ namespace osu.Desktop
                presence.Details = string.Empty;
            }

-            // update user information
+            // user party
+            if (!hideIdentifiableInformation && multiplayerClient.Room != null)
+            {
+                MultiplayerRoom room = multiplayerClient.Room;
+
+                presence.Party = new Party
+                {
+                    Privacy = string.IsNullOrEmpty(room.Settings.Password) ? Party.PrivacySetting.Public : Party.PrivacySetting.Private,
+                    ID = room.RoomID.ToString(),
+                    // technically lobbies can have infinite users, but Discord needs this to be set to something.
+                    // to make party display sensible, assign a powers of two above participants count (8 at minimum).
+                    Max = (int)Math.Max(8, Math.Pow(2, Math.Ceiling(Math.Log2(room.Users.Count)))),
+                    Size = room.Users.Count,
+                };
+
+                RoomSecret roomSecret = new RoomSecret
+                {
+                    RoomID = room.RoomID,
+                    Password = room.Settings.Password,
+                };
+
+                if (client.HasRegisteredUriScheme)
+                    presence.Secrets.JoinSecret = JsonConvert.SerializeObject(roomSecret);
+
+                // discord cannot handle both secrets and buttons at the same time, so we need to choose something.
+                // the multiplayer room seems more important.
+                presence.Buttons = null;
+            }
+            else
+            {
+                presence.Party = null;
+                presence.Secrets.JoinSecret = null;
+            }
+
+            // game images:
+            // large image tooltip
            if (privacyMode.Value == DiscordRichPresenceMode.Limited)
                presence.Assets.LargeImageText = string.Empty;
            else
@@ -131,17 +235,55 @@ namespace osu.Desktop
                    presence.Assets.LargeImageText = $"{user.Value.Username}" + (user.Value.Statistics?.GlobalRank > 0 ? $" (rank #{user.Value.Statistics.GlobalRank:N0})" : string.Empty);
            }

-            // update ruleset
+            // small image
            presence.Assets.SmallImageKey = ruleset.Value.IsLegacyRuleset() ? $"mode_{ruleset.Value.OnlineID}" : "mode_custom";
            presence.Assets.SmallImageText = ruleset.Value.Name;
-
-            client.SetPresence(presence);
        }

+        private void onJoin(object sender, JoinMessage args) => Scheduler.AddOnce(() =>
+        {
+            game.Window?.Raise();
+
+            if (!api.IsLoggedIn)
+            {
+                login?.Show();
+                return;
+            }
+
+            Logger.Log($"Received room secret from Discord RPC Client: \"{args.Secret}\"", LoggingTarget.Network, LogLevel.Debug);
+
+            // Stable and lazer share the same Discord client ID, meaning they can accept join requests from each other.
+            // Since they aren't compatible in multi, see if stable's format is being used and log to avoid confusion.
+            if (args.Secret[0] != '{' || !tryParseRoomSecret(args.Secret, out long roomId, out string? password))
+            {
+                Logger.Log("Could not join multiplayer room, invitation is invalid or incompatible.", LoggingTarget.Network, LogLevel.Important);
+                return;
+            }
+
+            var request = new GetRoomRequest(roomId);
+            request.Success += room => Schedule(() =>
+            {
+                game.PresentMultiplayerMatch(room, password);
+            });
+            request.Failure += _ => Logger.Log($"Could not join multiplayer room, room could not be found (room ID: {roomId}).", LoggingTarget.Network, LogLevel.Important);
+            api.Queue(request);
+        });
+
        private static readonly int ellipsis_length = Encoding.UTF8.GetByteCount(new[] { '…' });

-        private string truncate(string str)
+        private static string clampLength(string str)
        {
+            // Empty strings are fine to discord even though single-character strings are not. Make it make sense.
+            if (string.IsNullOrEmpty(str))
+                return str;
+
+            // As above, discord decides that *non-empty* strings shorter than 2 characters cannot possibly be valid input, because... reasons?
+            // And yes, that is two *characters*, or *codepoints*, not *bytes* as further down below (as determined by empirical testing).
+            // That seems very questionable, and isn't even documented anywhere. So to *make it* accept such valid input,
+            // just tack on enough of U+200B ZERO WIDTH SPACEs at the end.
+            if (str.Length < 2)
+                return str.PadRight(2, '\u200B');
+
            if (Encoding.UTF8.GetByteCount(str) <= 128)
                return str;

@@ -159,7 +301,31 @@ namespace osu.Desktop
            });
        }

-        private int? getBeatmapID(UserActivity activity)
+        private static bool tryParseRoomSecret(string secretJson, out long roomId, out string? password)
+        {
+            roomId = 0;
+            password = null;
+
+            RoomSecret? roomSecret;
+
+            try
+            {
+                roomSecret = JsonConvert.DeserializeObject<RoomSecret>(secretJson);
+            }
+            catch
+            {
+                return false;
+            }
+
+            if (roomSecret == null) return false;
+
+            roomId = roomSecret.RoomID;
+            password = roomSecret.Password;
+
+            return true;
+        }
+
+        private static int? getBeatmapID(UserActivity activity)
        {
            switch (activity)
            {
@@ -175,8 +341,20 @@ namespace osu.Desktop

        protected override void Dispose(bool isDisposing)
        {
+            if (multiplayerClient.IsNotNull())
+                multiplayerClient.RoomUpdated -= onRoomUpdated;
+
            client.Dispose();
            base.Dispose(isDisposing);
        }
+
+        private class RoomSecret
+        {
+            [JsonProperty(@"roomId", Required = Required.Always)]
+            public long RoomID { get; set; }
+
+            [JsonProperty(@"password", Required = Required.AllowNull)]
+            public string? Password { get; set; }
+        }
    }
 }
@@ -8,11 +8,13 @@
 using System;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
 using osu.Framework.Logging;

 namespace osu.Desktop
 {
    [SuppressMessage("ReSharper", "InconsistentNaming")]
+    [SupportedOSPlatform("windows")]
    internal static class NVAPI
    {
        private const string osu_filename = "osu!.exe";
@@ -487,6 +489,7 @@ namespace osu.Desktop
        public static uint Stride => (uint)Marshal.SizeOf(typeof(NvApplication)) | (2 << 16);
    }

+    [SuppressMessage("ReSharper", "InconsistentNaming")]
    internal enum NvStatus
    {
        OK = 0, // Success. Request is completed.
@@ -609,6 +612,7 @@ namespace osu.Desktop
        FIRMWARE_REVISION_NOT_SUPPORTED = -200, // The device's firmware is not supported.
    }

+    [SuppressMessage("ReSharper", "InconsistentNaming")]
    internal enum NvSystemType
    {
        UNKNOWN = 0,
@@ -616,6 +620,7 @@ namespace osu.Desktop
        DESKTOP = 2
    }

+    [SuppressMessage("ReSharper", "InconsistentNaming")]
    internal enum NvGpuType
    {
        UNKNOWN = 0,
@@ -623,6 +628,7 @@ namespace osu.Desktop
        DGPU = 2, // Discrete
    }

+    [SuppressMessage("ReSharper", "InconsistentNaming")]
    internal enum NvSettingID : uint
    {
        OGL_AA_LINE_GAMMA_ID = 0x2089BF6C,
@@ -715,6 +721,7 @@ namespace osu.Desktop
        INVALID_SETTING_ID = 0xFFFFFFFF
    }

+    [SuppressMessage("ReSharper", "InconsistentNaming")]
    internal enum NvShimSetting : uint
    {
        SHIM_RENDERING_MODE_INTEGRATED = 0x00000000,
@@ -729,6 +736,7 @@ namespace osu.Desktop
        SHIM_RENDERING_MODE_DEFAULT = SHIM_RENDERING_MODE_AUTO_SELECT
    }

+    [SuppressMessage("ReSharper", "InconsistentNaming")]
    internal enum NvThreadControlSetting : uint
    {
        OGL_THREAD_CONTROL_ENABLE = 0x00000001,
@@ -7,6 +7,7 @@ using System.IO;
 using System.Reflection;
 using System.Runtime.Versioning;
 using Microsoft.Win32;
+using osu.Desktop.Performance;
 using osu.Desktop.Security;
 using osu.Framework.Platform;
 using osu.Game;
@@ -15,11 +16,12 @@ using osu.Framework;
 using osu.Framework.Logging;
 using osu.Game.Updater;
 using osu.Desktop.Windows;
+using osu.Framework.Allocation;
 using osu.Game.IO;
 using osu.Game.IPC;
 using osu.Game.Online.Multiplayer;
+using osu.Game.Performance;
 using osu.Game.Utils;
-using SDL2;

 namespace osu.Desktop
 {
@@ -28,6 +30,9 @@ namespace osu.Desktop
        private OsuSchemeLinkIPCChannel? osuSchemeLinkIPCChannel;
        private ArchiveImportIPCChannel? archiveImportIPCChannel;

+        [Cached(typeof(IHighPerformanceSessionManager))]
+        private readonly HighPerformanceSessionManager highPerformanceSessionManager = new HighPerformanceSessionManager();
+
        public OsuGameDesktop(string[]? args = null)
            : base(args)
        {
@@ -86,8 +91,8 @@ namespace osu.Desktop
        [SupportedOSPlatform("windows")]
        private string? getStableInstallPathFromRegistry()
        {
-            using (RegistryKey? key = Registry.ClassesRoot.OpenSubKey("osu"))
-                return key?.OpenSubKey(@"shell\open\command")?.GetValue(string.Empty)?.ToString()?.Split('"')[1].Replace("osu!.exe", "");
+            using (RegistryKey? key = Registry.ClassesRoot.OpenSubKey("osu!"))
+                return key?.OpenSubKey(WindowsAssociationManager.SHELL_OPEN_COMMAND)?.GetValue(string.Empty)?.ToString()?.Split('"')[1].Replace("osu!.exe", "");
        }

        protected override UpdateManager CreateUpdateManager()
@@ -155,7 +160,7 @@ namespace osu.Desktop
            host.Window.Title = Name;
        }

-        protected override BatteryInfo CreateBatteryInfo() => new SDL2BatteryInfo();
+        protected override BatteryInfo CreateBatteryInfo() => FrameworkEnvironment.UseSDL3 ? new SDL3BatteryInfo() : new SDL2BatteryInfo();

        protected override void Dispose(bool isDisposing)
        {
@@ -163,23 +168,5 @@ namespace osu.Desktop
            osuSchemeLinkIPCChannel?.Dispose();
            archiveImportIPCChannel?.Dispose();
        }
-
-        private class SDL2BatteryInfo : BatteryInfo
-        {
-            public override double? ChargeLevel
-            {
-                get
-                {
-                    SDL.SDL_GetPowerInfo(out _, out int percentage);
-
-                    if (percentage == -1)
-                        return null;
-
-                    return percentage / 100.0;
-                }
-            }
-
-            public override bool OnBattery => SDL.SDL_GetPowerInfo(out _, out _) == SDL.SDL_PowerState.SDL_POWERSTATE_ON_BATTERY;
-        }
    }
 }
@@ -0,0 +1,60 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Runtime;
+using System.Threading;
+using osu.Framework.Allocation;
+using osu.Framework.Logging;
+using osu.Game.Performance;
+
+namespace osu.Desktop.Performance
+{
+    public class HighPerformanceSessionManager : IHighPerformanceSessionManager
+    {
+        public bool IsSessionActive => activeSessions > 0;
+
+        private int activeSessions;
+
+        private GCLatencyMode originalGCMode;
+
+        public IDisposable BeginSession()
+        {
+            enterSession();
+            return new InvokeOnDisposal<HighPerformanceSessionManager>(this, static m => m.exitSession());
+        }
+
+        private void enterSession()
+        {
+            if (Interlocked.Increment(ref activeSessions) > 1)
+            {
+                Logger.Log($"High performance session requested ({activeSessions} running in total)");
+                return;
+            }
+
+            Logger.Log("Starting high performance session");
+
+            originalGCMode = GCSettings.LatencyMode;
+            GCSettings.LatencyMode = GCLatencyMode.LowLatency;
+
+            // Without doing this, the new GC mode won't kick in until the next GC, which could be at a more noticeable point in time.
+            GC.Collect(0);
+        }
+
+        private void exitSession()
+        {
+            if (Interlocked.Decrement(ref activeSessions) > 0)
+            {
+                Logger.Log($"High performance session finished ({activeSessions} others remain)");
+                return;
+            }
+
+            Logger.Log("Ending high performance session");
+
+            if (GCSettings.LatencyMode == GCLatencyMode.LowLatency)
+                GCSettings.LatencyMode = originalGCMode;
+
+            // No GC.Collect() as we were already collecting at a higher frequency in the old mode.
+        }
+    }
+}
@@ -5,6 +5,7 @@ using System;
 using System.IO;
 using System.Runtime.Versioning;
 using osu.Desktop.LegacyIpc;
+using osu.Desktop.Windows;
 using osu.Framework;
 using osu.Framework.Development;
 using osu.Framework.Logging;
@@ -12,7 +13,7 @@ using osu.Framework.Platform;
 using osu.Game;
 using osu.Game.IPC;
 using osu.Game.Tournament;
-using SDL2;
+using SDL;
 using Squirrel;

 namespace osu.Desktop
@@ -51,16 +52,19 @@ namespace osu.Desktop
                // See https://www.mongodb.com/docs/realm/sdk/dotnet/compatibility/
                if (windowsVersion.Major < 6 || (windowsVersion.Major == 6 && windowsVersion.Minor <= 2))
                {
-                    // If users running in compatibility mode becomes more of a common thing, we may want to provide better guidance or even consider
-                    // disabling it ourselves.
-                    // We could also better detect compatibility mode if required:
-                    // https://stackoverflow.com/questions/10744651/how-i-can-detect-if-my-application-is-running-under-compatibility-mode#comment58183249_10744730
-                    SDL.SDL_ShowSimpleMessageBox(SDL.SDL_MessageBoxFlags.SDL_MESSAGEBOX_ERROR,
-                        "Your operating system is too old to run osu!",
-                        "This version of osu! requires at least Windows 8.1 to run.\n"
-                        + "Please upgrade your operating system or consider using an older version of osu!.\n\n"
-                        + "If you are running a newer version of windows, please check you don't have \"Compatibility mode\" turned on for osu!", IntPtr.Zero);
-                    return;
+                    unsafe
+                    {
+                        // If users running in compatibility mode becomes more of a common thing, we may want to provide better guidance or even consider
+                        // disabling it ourselves.
+                        // We could also better detect compatibility mode if required:
+                        // https://stackoverflow.com/questions/10744651/how-i-can-detect-if-my-application-is-running-under-compatibility-mode#comment58183249_10744730
+                        SDL3.SDL_ShowSimpleMessageBox(SDL_MessageBoxFlags.SDL_MESSAGEBOX_ERROR,
+                            "Your operating system is too old to run osu!"u8,
+                            "This version of osu! requires at least Windows 8.1 to run.\n"u8
+                            + "Please upgrade your operating system or consider using an older version of osu!.\n\n"u8
+                            + "If you are running a newer version of windows, please check you don't have \"Compatibility mode\" turned on for osu!"u8, null);
+                        return;
+                    }
                }

                setupSquirrel();
@@ -69,7 +73,8 @@ namespace osu.Desktop
            // NVIDIA profiles are based on the executable name of a process.
            // Lazer and stable share the same executable name.
            // Stable sets this setting to "Off", which may not be what we want, so let's force it back to the default "Auto" on startup.
-            NVAPI.ThreadedOptimisations = NvThreadControlSetting.OGL_THREAD_CONTROL_DEFAULT;
+            if (OperatingSystem.IsWindows())
+                NVAPI.ThreadedOptimisations = NvThreadControlSetting.OGL_THREAD_CONTROL_DEFAULT;

            // Back up the cwd before DesktopGameHost changes it
            string cwd = Environment.CurrentDirectory;
@@ -102,7 +107,13 @@ namespace osu.Desktop
                }
            }

-            using (DesktopGameHost host = Host.GetSuitableDesktopHost(gameName, new HostOptions { IPCPort = !tournamentClient ? OsuGame.IPC_PORT : null }))
+            var hostOptions = new HostOptions
+            {
+                IPCPort = !tournamentClient ? OsuGame.IPC_PORT : null,
+                FriendlyGameName = OsuGameBase.GAME_NAME,
+            };
+
+            using (DesktopGameHost host = Host.GetSuitableDesktopHost(gameName, hostOptions))
            {
                if (!host.IsPrimaryInstance)
                {
@@ -173,13 +184,16 @@ namespace osu.Desktop
            {
                tools.CreateShortcutForThisExe();
                tools.CreateUninstallerRegistryEntry();
+                WindowsAssociationManager.InstallAssociations();
            }, onAppUpdate: (_, tools) =>
            {
                tools.CreateUninstallerRegistryEntry();
+                WindowsAssociationManager.UpdateAssociations();
            }, onAppUninstall: (_, tools) =>
            {
                tools.RemoveShortcutForThisExe();
                tools.RemoveUninstallerRegistryEntry();
+                WindowsAssociationManager.UninstallAssociations();
            }, onEveryRun: (_, _, _) =>
            {
                // While setting the `ProcessAppUserModelId` fixes duplicate icons/shortcuts on the taskbar, it currently
@@ -0,0 +1,25 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Utils;
+
+namespace osu.Desktop
+{
+    internal class SDL2BatteryInfo : BatteryInfo
+    {
+        public override double? ChargeLevel
+        {
+            get
+            {
+                SDL2.SDL.SDL_GetPowerInfo(out _, out int percentage);
+
+                if (percentage == -1)
+                    return null;
+
+                return percentage / 100.0;
+            }
+        }
+
+        public override bool OnBattery => SDL2.SDL.SDL_GetPowerInfo(out _, out _) == SDL2.SDL.SDL_PowerState.SDL_POWERSTATE_ON_BATTERY;
+    }
+}
@@ -0,0 +1,27 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Utils;
+using SDL;
+
+namespace osu.Desktop
+{
+    internal unsafe class SDL3BatteryInfo : BatteryInfo
+    {
+        public override double? ChargeLevel
+        {
+            get
+            {
+                int percentage;
+                SDL3.SDL_GetPowerInfo(null, &percentage);
+
+                if (percentage == -1)
+                    return null;
+
+                return percentage / 100.0;
+            }
+        }
+
+        public override bool OnBattery => SDL3.SDL_GetPowerInfo(null, null) == SDL_PowerState.SDL_POWERSTATE_ON_BATTERY;
+    }
+}
@@ -2,7 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.

 using System;
-using System.Security.Principal;
 using osu.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -21,48 +20,14 @@ namespace osu.Desktop.Security
        [Resolved]
        private INotificationOverlay notifications { get; set; } = null!;

-        private bool elevated;
-
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-            elevated = checkElevated();
-        }
-
        protected override void LoadComplete()
        {
            base.LoadComplete();

-            if (elevated)
+            if (Environment.IsPrivilegedProcess)
                notifications.Post(new ElevatedPrivilegesNotification());
        }

-        private bool checkElevated()
-        {
-            try
-            {
-                switch (RuntimeInfo.OS)
-                {
-                    case RuntimeInfo.Platform.Windows:
-                        if (!OperatingSystem.IsWindows()) return false;
-
-                        var windowsIdentity = WindowsIdentity.GetCurrent();
-                        var windowsPrincipal = new WindowsPrincipal(windowsIdentity);
-
-                        return windowsPrincipal.IsInRole(WindowsBuiltInRole.Administrator);
-
-                    case RuntimeInfo.Platform.macOS:
-                    case RuntimeInfo.Platform.Linux:
-                        return Mono.Unix.Native.Syscall.geteuid() == 0;
-                }
-            }
-            catch
-            {
-            }
-
-            return false;
-        }
-
        private partial class ElevatedPrivilegesNotification : SimpleNotification
        {
            public override bool IsImportant => true;
@@ -0,0 +1,17 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.IO;
+
+namespace osu.Desktop.Windows
+{
+    public static class Icons
+    {
+        /// <summary>
+        /// Fully qualified path to the directory that contains icons (in the installation folder).
+        /// </summary>
+        private static readonly string icon_directory = Path.GetDirectoryName(typeof(Icons).Assembly.Location)!;
+
+        public static string Lazer => Path.Join(icon_directory, "lazer.ico");
+    }
+}
@@ -0,0 +1,295 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+using Microsoft.Win32;
+using osu.Framework.Localisation;
+using osu.Framework.Logging;
+using osu.Game.Localisation;
+
+namespace osu.Desktop.Windows
+{
+    [SupportedOSPlatform("windows")]
+    public static class WindowsAssociationManager
+    {
+        private const string software_classes = @"Software\Classes";
+
+        /// <summary>
+        /// Sub key for setting the icon.
+        /// https://learn.microsoft.com/en-us/windows/win32/com/defaulticon
+        /// </summary>
+        private const string default_icon = @"DefaultIcon";
+
+        /// <summary>
+        /// Sub key for setting the command line that the shell invokes.
+        /// https://learn.microsoft.com/en-us/windows/win32/com/shell
+        /// </summary>
+        internal const string SHELL_OPEN_COMMAND = @"Shell\Open\Command";
+
+        private static readonly string exe_path = Path.ChangeExtension(typeof(WindowsAssociationManager).Assembly.Location, ".exe").Replace('/', '\\');
+
+        /// <summary>
+        /// Program ID prefix used for file associations. Should be relatively short since the full program ID has a 39 character limit,
+        /// see https://learn.microsoft.com/en-us/windows/win32/com/-progid--key.
+        /// </summary>
+        private const string program_id_prefix = "osu.File";
+
+        private static readonly FileAssociation[] file_associations =
+        {
+            new FileAssociation(@".osz", WindowsAssociationManagerStrings.OsuBeatmap, Icons.Lazer),
+            new FileAssociation(@".olz", WindowsAssociationManagerStrings.OsuBeatmap, Icons.Lazer),
+            new FileAssociation(@".osr", WindowsAssociationManagerStrings.OsuReplay, Icons.Lazer),
+            new FileAssociation(@".osk", WindowsAssociationManagerStrings.OsuSkin, Icons.Lazer),
+        };
+
+        private static readonly UriAssociation[] uri_associations =
+        {
+            new UriAssociation(@"osu", WindowsAssociationManagerStrings.OsuProtocol, Icons.Lazer),
+            new UriAssociation(@"osump", WindowsAssociationManagerStrings.OsuMultiplayer, Icons.Lazer),
+        };
+
+        /// <summary>
+        /// Installs file and URI associations.
+        /// </summary>
+        /// <remarks>
+        /// Call <see cref="UpdateDescriptions"/> in a timely fashion to keep descriptions up-to-date and localised.
+        /// </remarks>
+        public static void InstallAssociations()
+        {
+            try
+            {
+                updateAssociations();
+                updateDescriptions(null); // write default descriptions in case `UpdateDescriptions()` is not called.
+                NotifyShellUpdate();
+            }
+            catch (Exception e)
+            {
+                Logger.Error(e, @$"Failed to install file and URI associations: {e.Message}");
+            }
+        }
+
+        /// <summary>
+        /// Updates associations with latest definitions.
+        /// </summary>
+        /// <remarks>
+        /// Call <see cref="UpdateDescriptions"/> in a timely fashion to keep descriptions up-to-date and localised.
+        /// </remarks>
+        public static void UpdateAssociations()
+        {
+            try
+            {
+                updateAssociations();
+
+                // TODO: Remove once UpdateDescriptions() is called as specified in the xmldoc.
+                updateDescriptions(null); // always write default descriptions, in case of updating from an older version in which file associations were not implemented/installed
+
+                NotifyShellUpdate();
+            }
+            catch (Exception e)
+            {
+                Logger.Error(e, @"Failed to update file and URI associations.");
+            }
+        }
+
+        public static void UpdateDescriptions(LocalisationManager localisationManager)
+        {
+            try
+            {
+                updateDescriptions(localisationManager);
+                NotifyShellUpdate();
+            }
+            catch (Exception e)
+            {
+                Logger.Error(e, @"Failed to update file and URI association descriptions.");
+            }
+        }
+
+        public static void UninstallAssociations()
+        {
+            try
+            {
+                foreach (var association in file_associations)
+                    association.Uninstall();
+
+                foreach (var association in uri_associations)
+                    association.Uninstall();
+
+                NotifyShellUpdate();
+            }
+            catch (Exception e)
+            {
+                Logger.Error(e, @"Failed to uninstall file and URI associations.");
+            }
+        }
+
+        public static void NotifyShellUpdate() => SHChangeNotify(EventId.SHCNE_ASSOCCHANGED, Flags.SHCNF_IDLIST, IntPtr.Zero, IntPtr.Zero);
+
+        /// <summary>
+        /// Installs or updates associations.
+        /// </summary>
+        private static void updateAssociations()
+        {
+            foreach (var association in file_associations)
+                association.Install();
+
+            foreach (var association in uri_associations)
+                association.Install();
+        }
+
+        private static void updateDescriptions(LocalisationManager? localisation)
+        {
+            foreach (var association in file_associations)
+                association.UpdateDescription(getLocalisedString(association.Description));
+
+            foreach (var association in uri_associations)
+                association.UpdateDescription(getLocalisedString(association.Description));
+
+            string getLocalisedString(LocalisableString s)
+            {
+                if (localisation == null)
+                    return s.ToString();
+
+                var b = localisation.GetLocalisedBindableString(s);
+                b.UnbindAll();
+                return b.Value;
+            }
+        }
+
+        #region Native interop
+
+        [DllImport("Shell32.dll")]
+        private static extern void SHChangeNotify(EventId wEventId, Flags uFlags, IntPtr dwItem1, IntPtr dwItem2);
+
+        [SuppressMessage("ReSharper", "InconsistentNaming")]
+        private enum EventId
+        {
+            /// <summary>
+            /// A file type association has changed. <see cref="Flags.SHCNF_IDLIST"/> must be specified in the uFlags parameter.
+            /// dwItem1 and dwItem2 are not used and must be <see cref="IntPtr.Zero"/>. This event should also be sent for registered protocols.
+            /// </summary>
+            SHCNE_ASSOCCHANGED = 0x08000000
+        }
+
+        [SuppressMessage("ReSharper", "InconsistentNaming")]
+        private enum Flags : uint
+        {
+            SHCNF_IDLIST = 0x0000
+        }
+
+        #endregion
+
+        private record FileAssociation(string Extension, LocalisableString Description, string IconPath)
+        {
+            private string programId => $@"{program_id_prefix}{Extension}";
+
+            /// <summary>
+            /// Installs a file extension association in accordance with https://learn.microsoft.com/en-us/windows/win32/com/-progid--key
+            /// </summary>
+            public void Install()
+            {
+                using var classes = Registry.CurrentUser.OpenSubKey(software_classes, true);
+                if (classes == null) return;
+
+                // register a program id for the given extension
+                using (var programKey = classes.CreateSubKey(programId))
+                {
+                    using (var defaultIconKey = programKey.CreateSubKey(default_icon))
+                        defaultIconKey.SetValue(null, IconPath);
+
+                    using (var openCommandKey = programKey.CreateSubKey(SHELL_OPEN_COMMAND))
+                        openCommandKey.SetValue(null, $@"""{exe_path}"" ""%1""");
+                }
+
+                using (var extensionKey = classes.CreateSubKey(Extension))
+                {
+                    // set ourselves as the default program
+                    extensionKey.SetValue(null, programId);
+
+                    // add to the open with dialog
+                    // https://learn.microsoft.com/en-us/windows/win32/shell/how-to-include-an-application-on-the-open-with-dialog-box
+                    using (var openWithKey = extensionKey.CreateSubKey(@"OpenWithProgIds"))
+                        openWithKey.SetValue(programId, string.Empty);
+                }
+            }
+
+            public void UpdateDescription(string description)
+            {
+                using var classes = Registry.CurrentUser.OpenSubKey(software_classes, true);
+                if (classes == null) return;
+
+                using (var programKey = classes.OpenSubKey(programId, true))
+                    programKey?.SetValue(null, description);
+            }
+
+            /// <summary>
+            /// Uninstalls the file extension association in accordance with https://learn.microsoft.com/en-us/windows/win32/shell/fa-file-types#deleting-registry-information-during-uninstallation
+            /// </summary>
+            public void Uninstall()
+            {
+                using var classes = Registry.CurrentUser.OpenSubKey(software_classes, true);
+                if (classes == null) return;
+
+                using (var extensionKey = classes.OpenSubKey(Extension, true))
+                {
+                    // clear our default association so that Explorer doesn't show the raw programId to users
+                    // the null/(Default) entry is used for both ProdID association and as a fallback friendly name, for legacy reasons
+                    if (extensionKey?.GetValue(null) is string s && s == programId)
+                        extensionKey.SetValue(null, string.Empty);
+
+                    using (var openWithKey = extensionKey?.CreateSubKey(@"OpenWithProgIds"))
+                        openWithKey?.DeleteValue(programId, throwOnMissingValue: false);
+                }
+
+                classes.DeleteSubKeyTree(programId, throwOnMissingSubKey: false);
+            }
+        }
+
+        private record UriAssociation(string Protocol, LocalisableString Description, string IconPath)
+        {
+            /// <summary>
+            /// "The <c>URL Protocol</c> string value indicates that this key declares a custom pluggable protocol handler."
+            /// See https://learn.microsoft.com/en-us/previous-versions/windows/internet-explorer/ie-developer/platform-apis/aa767914(v=vs.85).
+            /// </summary>
+            public const string URL_PROTOCOL = @"URL Protocol";
+
+            /// <summary>
+            /// Registers an URI protocol handler in accordance with https://learn.microsoft.com/en-us/previous-versions/windows/internet-explorer/ie-developer/platform-apis/aa767914(v=vs.85).
+            /// </summary>
+            public void Install()
+            {
+                using var classes = Registry.CurrentUser.OpenSubKey(software_classes, true);
+                if (classes == null) return;
+
+                using (var protocolKey = classes.CreateSubKey(Protocol))
+                {
+                    protocolKey.SetValue(URL_PROTOCOL, string.Empty);
+
+                    using (var defaultIconKey = protocolKey.CreateSubKey(default_icon))
+                        defaultIconKey.SetValue(null, IconPath);
+
+                    using (var openCommandKey = protocolKey.CreateSubKey(SHELL_OPEN_COMMAND))
+                        openCommandKey.SetValue(null, $@"""{exe_path}"" ""%1""");
+                }
+            }
+
+            public void UpdateDescription(string description)
+            {
+                using var classes = Registry.CurrentUser.OpenSubKey(software_classes, true);
+                if (classes == null) return;
+
+                using (var protocolKey = classes.OpenSubKey(Protocol, true))
+                    protocolKey?.SetValue(null, $@"URL:{description}");
+            }
+
+            public void Uninstall()
+            {
+                using var classes = Registry.CurrentUser.OpenSubKey(software_classes, true);
+                classes?.DeleteSubKeyTree(Protocol, throwOnMissingSubKey: false);
+            }
+        }
+    }
+}
@@ -24,11 +24,13 @@
  </ItemGroup>
  <ItemGroup Label="Package References">
    <PackageReference Include="Clowd.Squirrel" Version="2.11.1" />
-    <PackageReference Include="Mono.Posix.NETStandard" Version="1.0.0" />
    <PackageReference Include="System.IO.Packaging" Version="8.0.0" />
    <PackageReference Include="DiscordRichPresence" Version="1.2.1.24" />
  </ItemGroup>
  <ItemGroup Label="Resources">
    <EmbeddedResource Include="lazer.ico" />
  </ItemGroup>
+  <ItemGroup Label="Windows Icons">
+    <Content Include="*.ico" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" />
+  </ItemGroup>
 </Project>
@@ -20,6 +20,7 @@
      <file src="**.dll" target="lib\net45\"/>
      <file src="**.config" target="lib\net45\"/>
      <file src="**.json" target="lib\net45\"/>
+      <file src="**.ico" target="lib\net45\"/>
      <file src="icon.png" target=""/>
    </files>
 </package>
@@ -0,0 +1,48 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using BenchmarkDotNet.Attributes;
+using osu.Game.Utils;
+
+namespace osu.Game.Benchmarks
+{
+    public class BenchmarkStringComparison
+    {
+        private string[] strings = null!;
+
+        [GlobalSetup]
+        public void GlobalSetUp()
+        {
+            strings = new string[10000];
+
+            for (int i = 0; i < strings.Length; ++i)
+                strings[i] = Guid.NewGuid().ToString();
+
+            for (int i = 0; i < strings.Length; ++i)
+            {
+                if (i % 2 == 0)
+                    strings[i] = strings[i].ToUpperInvariant();
+            }
+        }
+
+        [Benchmark]
+        public void OrdinalIgnoreCase() => compare(StringComparer.OrdinalIgnoreCase);
+
+        [Benchmark]
+        public void OrdinalSortByCase() => compare(OrdinalSortByCaseStringComparer.DEFAULT);
+
+        [Benchmark]
+        public void InvariantCulture() => compare(StringComparer.InvariantCulture);
+
+        private void compare(IComparer<string> comparer)
+        {
+            for (int i = 0; i < strings.Length; ++i)
+            {
+                for (int j = i + 1; j < strings.Length; ++j)
+                    _ = comparer.Compare(strings[i], strings[j]);
+            }
+        }
+    }
+}
@@ -7,7 +7,7 @@
  </PropertyGroup>

  <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.13.9" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.13.12" />
    <PackageReference Include="nunit" Version="3.14.0" />
    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
  </ItemGroup>
@@ -53,6 +53,8 @@ namespace osu.Game.Rulesets.Catch.Tests
        [TestCase("3689906", new[] { typeof(CatchModDoubleTime), typeof(CatchModEasy) })]
        [TestCase("3949367", new[] { typeof(CatchModDoubleTime), typeof(CatchModEasy) })]
        [TestCase("112643")]
+        [TestCase("1041052", new[] { typeof(CatchModHardRock) })]
+        [TestCase("high-speed-multiplier-precision")]
        public new void Test(string name, params Type[] mods) => base.Test(name, mods);

        protected override IEnumerable<ConvertValue> CreateConvertValue(HitObject hitObject)
@@ -0,0 +1,59 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using NUnit.Framework;
+using osu.Game.Rulesets.Catch.Beatmaps;
+using osu.Game.Rulesets.Catch.Judgements;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Catch.Scoring;
+
+namespace osu.Game.Rulesets.Catch.Tests
+{
+    [TestFixture]
+    public class CatchHealthProcessorTest
+    {
+        private static readonly object[][] test_cases =
+        [
+            // hitobject, starting HP, fail expected after miss
+            [new Fruit(), 0.01, true],
+            [new Droplet(), 0.01, true],
+            [new TinyDroplet(), 0, false],
+            [new Banana(), 0, false],
+            [new BananaShower(), 0, false]
+        ];
+
+        [TestCaseSource(nameof(test_cases))]
+        public void TestFailAfterMinResult(CatchHitObject hitObject, double startingHealth, bool failExpected)
+        {
+            var healthProcessor = new CatchHealthProcessor(0);
+            healthProcessor.ApplyBeatmap(new CatchBeatmap
+            {
+                HitObjects = { hitObject }
+            });
+            healthProcessor.Health.Value = startingHealth;
+
+            var result = new CatchJudgementResult(hitObject, hitObject.CreateJudgement());
+            result.Type = result.Judgement.MinResult;
+            healthProcessor.ApplyResult(result);
+
+            Assert.That(healthProcessor.HasFailed, Is.EqualTo(failExpected));
+        }
+
+        [TestCaseSource(nameof(test_cases))]
+        public void TestNoFailAfterMaxResult(CatchHitObject hitObject, double startingHealth, bool _)
+        {
+            var healthProcessor = new CatchHealthProcessor(0);
+            healthProcessor.ApplyBeatmap(new CatchBeatmap
+            {
+                HitObjects = { hitObject }
+            });
+            healthProcessor.Health.Value = startingHealth;
+
+            var result = new CatchJudgementResult(hitObject, hitObject.CreateJudgement());
+            result.Type = result.Judgement.MaxResult;
+            healthProcessor.ApplyResult(result);
+
+            Assert.That(healthProcessor.HasFailed, Is.False);
+        }
+    }
+}
@@ -0,0 +1,158 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Catch.Edit.Checks;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Tests.Beatmaps;
+
+namespace osu.Game.Rulesets.Catch.Tests.Editor.Checks
+{
+    [TestFixture]
+    public class CheckCatchAbnormalDifficultySettingsTest
+    {
+        private CheckCatchAbnormalDifficultySettings check = null!;
+
+        private readonly IBeatmap beatmap = new Beatmap<HitObject>();
+
+        [SetUp]
+        public void Setup()
+        {
+            check = new CheckCatchAbnormalDifficultySettings();
+
+            beatmap.BeatmapInfo.Ruleset = new CatchRuleset().RulesetInfo;
+            beatmap.Difficulty = new BeatmapDifficulty
+            {
+                ApproachRate = 5,
+                CircleSize = 5,
+                DrainRate = 5,
+            };
+        }
+
+        [Test]
+        public void TestNormalSettings()
+        {
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(0));
+        }
+
+        [Test]
+        public void TestApproachRateTwoDecimals()
+        {
+            beatmap.Difficulty.ApproachRate = 5.55f;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateMoreThanOneDecimal);
+        }
+
+        [Test]
+        public void TestCircleSizeTwoDecimals()
+        {
+            beatmap.Difficulty.CircleSize = 5.55f;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateMoreThanOneDecimal);
+        }
+
+        [Test]
+        public void TestDrainRateTwoDecimals()
+        {
+            beatmap.Difficulty.DrainRate = 5.55f;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateMoreThanOneDecimal);
+        }
+
+        [Test]
+        public void TestApproachRateUnder()
+        {
+            beatmap.Difficulty.ApproachRate = -10;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        [Test]
+        public void TestCircleSizeUnder()
+        {
+            beatmap.Difficulty.CircleSize = -10;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        [Test]
+        public void TestDrainRateUnder()
+        {
+            beatmap.Difficulty.DrainRate = -10;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        [Test]
+        public void TestApproachRateOver()
+        {
+            beatmap.Difficulty.ApproachRate = 20;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        [Test]
+        public void TestCircleSizeOver()
+        {
+            beatmap.Difficulty.CircleSize = 20;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        [Test]
+        public void TestDrainRateOver()
+        {
+            beatmap.Difficulty.DrainRate = 20;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        private BeatmapVerifierContext getContext()
+        {
+            return new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+        }
+    }
+}
@@ -0,0 +1,66 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Catch.UI;
+using osu.Game.Tests.Visual;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Catch.Tests.Editor
+{
+    public partial class TestSceneCatchEditorSaving : EditorSavingTestScene
+    {
+        protected override Ruleset CreateRuleset() => new CatchRuleset();
+
+        [Test]
+        public void TestCatchJuiceStreamTickCorrect()
+        {
+            AddStep("enter timing mode", () => InputManager.Key(Key.F3));
+            AddStep("add timing point", () => EditorBeatmap.ControlPointInfo.Add(0, new TimingControlPoint()));
+            AddStep("enter compose mode", () => InputManager.Key(Key.F1));
+
+            Vector2 startPoint = Vector2.Zero;
+            float increment = 0;
+
+            AddUntilStep("wait for playfield", () => this.ChildrenOfType<CatchPlayfield>().FirstOrDefault()?.IsLoaded == true);
+            AddStep("move to centre", () =>
+            {
+                var playfield = this.ChildrenOfType<CatchPlayfield>().Single();
+                startPoint = playfield.ScreenSpaceDrawQuad.Centre + new Vector2(0, playfield.ScreenSpaceDrawQuad.Height / 3);
+                increment = playfield.ScreenSpaceDrawQuad.Height / 10;
+                InputManager.MoveMouseTo(startPoint);
+            });
+            AddStep("choose juice stream placing tool", () => InputManager.Key(Key.Number3));
+            AddStep("start placement", () => InputManager.Click(MouseButton.Left));
+
+            AddStep("move to next", () => InputManager.MoveMouseTo(startPoint + new Vector2(2 * increment, -increment)));
+            AddStep("add node", () => InputManager.Click(MouseButton.Left));
+
+            AddStep("move to next", () => InputManager.MoveMouseTo(startPoint + new Vector2(-2 * increment, -2 * increment)));
+            AddStep("add node", () => InputManager.Click(MouseButton.Left));
+
+            AddStep("move to next", () => InputManager.MoveMouseTo(startPoint + new Vector2(0, -3 * increment)));
+            AddStep("end placement", () => InputManager.Click(MouseButton.Right));
+
+            AddUntilStep("juice stream placed", () => EditorBeatmap.HitObjects, () => Has.Count.EqualTo(1));
+
+            int largeDropletCount = 0, tinyDropletCount = 0;
+            AddStep("store droplet count", () =>
+            {
+                largeDropletCount = EditorBeatmap.HitObjects[0].NestedHitObjects.Count(t => t.GetType() == typeof(Droplet));
+                tinyDropletCount = EditorBeatmap.HitObjects[0].NestedHitObjects.Count(t => t.GetType() == typeof(TinyDroplet));
+            });
+
+            SaveEditor();
+            ReloadEditorToSameBeatmap();
+
+            AddAssert("large droplet count is the same", () => EditorBeatmap.HitObjects[0].NestedHitObjects.Count(t => t.GetType() == typeof(Droplet)), () => Is.EqualTo(largeDropletCount));
+            AddAssert("tiny droplet count is the same", () => EditorBeatmap.HitObjects[0].NestedHitObjects.Count(t => t.GetType() == typeof(TinyDroplet)), () => Is.EqualTo(tinyDropletCount));
+        }
+    }
+}
@@ -0,0 +1,253 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Tests.Beatmaps;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Catch.Tests.Editor
+{
+    [TestFixture]
+    public partial class TestSceneCatchReverseSelection : TestSceneEditor
+    {
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new TestBeatmap(ruleset, false);
+
+        [Test]
+        public void TestReverseSelectionTwoFruits()
+        {
+            CatchHitObject[] objects = null!;
+            bool[] newCombos = null!;
+
+            addObjects([
+                new Fruit
+                {
+                    StartTime = 200,
+                    X = 0,
+                },
+                new Fruit
+                {
+                    StartTime = 400,
+                    X = 20,
+                }
+            ]);
+
+            AddStep("store objects & new combo data", () =>
+            {
+                objects = getObjects().ToArray();
+                newCombos = getObjectNewCombos().ToArray();
+            });
+
+            selectEverything();
+            reverseSelection();
+
+            AddAssert("objects reversed", getObjects, () => Is.EqualTo(objects.Reverse()));
+            AddAssert("new combo positions preserved", getObjectNewCombos, () => Is.EqualTo(newCombos));
+        }
+
+        [Test]
+        public void TestReverseSelectionThreeFruits()
+        {
+            CatchHitObject[] objects = null!;
+            bool[] newCombos = null!;
+
+            addObjects([
+                new Fruit
+                {
+                    StartTime = 200,
+                    X = 0,
+                },
+                new Fruit
+                {
+                    StartTime = 400,
+                    X = 20,
+                },
+                new Fruit
+                {
+                    StartTime = 600,
+                    X = 40,
+                }
+            ]);
+
+            AddStep("store objects & new combo data", () =>
+            {
+                objects = getObjects().ToArray();
+                newCombos = getObjectNewCombos().ToArray();
+            });
+
+            selectEverything();
+            reverseSelection();
+
+            AddAssert("objects reversed", getObjects, () => Is.EqualTo(objects.Reverse()));
+            AddAssert("new combo positions preserved", getObjectNewCombos, () => Is.EqualTo(newCombos));
+        }
+
+        [Test]
+        public void TestReverseSelectionFruitAndJuiceStream()
+        {
+            CatchHitObject[] objects = null!;
+            bool[] newCombos = null!;
+
+            addObjects([
+                new Fruit
+                {
+                    StartTime = 200,
+                    X = 0,
+                },
+                new JuiceStream
+                {
+                    StartTime = 400,
+                    X = 20,
+                    Path = new SliderPath
+                    {
+                        ControlPoints =
+                        {
+                            new PathControlPoint(),
+                            new PathControlPoint(new Vector2(50))
+                        }
+                    }
+                }
+            ]);
+
+            AddStep("store objects & new combo data", () =>
+            {
+                objects = getObjects().ToArray();
+                newCombos = getObjectNewCombos().ToArray();
+            });
+
+            selectEverything();
+            reverseSelection();
+
+            AddAssert("objects reversed", getObjects, () => Is.EqualTo(objects.Reverse()));
+            AddAssert("new combo positions preserved", getObjectNewCombos, () => Is.EqualTo(newCombos));
+        }
+
+        [Test]
+        public void TestReverseSelectionTwoFruitsAndJuiceStream()
+        {
+            CatchHitObject[] objects = null!;
+            bool[] newCombos = null!;
+
+            addObjects([
+                new Fruit
+                {
+                    StartTime = 200,
+                    X = 0,
+                },
+                new Fruit
+                {
+                    StartTime = 400,
+                    X = 20,
+                },
+                new JuiceStream
+                {
+                    StartTime = 600,
+                    X = 40,
+                    Path = new SliderPath
+                    {
+                        ControlPoints =
+                        {
+                            new PathControlPoint(),
+                            new PathControlPoint(new Vector2(50))
+                        }
+                    }
+                }
+            ]);
+
+            AddStep("store objects & new combo data", () =>
+            {
+                objects = getObjects().ToArray();
+                newCombos = getObjectNewCombos().ToArray();
+            });
+
+            selectEverything();
+            reverseSelection();
+
+            AddAssert("objects reversed", getObjects, () => Is.EqualTo(objects.Reverse()));
+            AddAssert("new combo positions preserved", getObjectNewCombos, () => Is.EqualTo(newCombos));
+        }
+
+        [Test]
+        public void TestReverseSelectionTwoCombos()
+        {
+            CatchHitObject[] objects = null!;
+            bool[] newCombos = null!;
+
+            addObjects([
+                new Fruit
+                {
+                    StartTime = 200,
+                    X = 0,
+                },
+                new Fruit
+                {
+                    StartTime = 400,
+                    X = 20,
+                },
+                new Fruit
+                {
+                    StartTime = 600,
+                    X = 40,
+                },
+
+                new Fruit
+                {
+                    StartTime = 800,
+                    NewCombo = true,
+                    X = 60,
+                },
+                new Fruit
+                {
+                    StartTime = 1000,
+                    X = 80,
+                },
+                new Fruit
+                {
+                    StartTime = 1200,
+                    X = 100,
+                }
+            ]);
+
+            AddStep("store objects & new combo data", () =>
+            {
+                objects = getObjects().ToArray();
+                newCombos = getObjectNewCombos().ToArray();
+            });
+
+            selectEverything();
+            reverseSelection();
+
+            AddAssert("objects reversed", getObjects, () => Is.EqualTo(objects.Reverse()));
+            AddAssert("new combo positions preserved", getObjectNewCombos, () => Is.EqualTo(newCombos));
+        }
+
+        private void addObjects(CatchHitObject[] hitObjects) => AddStep("Add objects", () => EditorBeatmap.AddRange(hitObjects));
+
+        private IEnumerable<CatchHitObject> getObjects() => EditorBeatmap.HitObjects.OfType<CatchHitObject>();
+
+        private IEnumerable<bool> getObjectNewCombos() => getObjects().Select(ho => ho.NewCombo);
+
+        private void selectEverything()
+        {
+            AddStep("Select everything", () =>
+            {
+                EditorBeatmap.SelectedHitObjects.AddRange(EditorBeatmap.HitObjects);
+            });
+        }
+
+        private void reverseSelection()
+        {
+            AddStep("Reverse selection", () =>
+            {
+                InputManager.PressKey(Key.LControl);
+                InputManager.Key(Key.G);
+                InputManager.ReleaseKey(Key.LControl);
+            });
+        }
+    }
+}
@@ -74,7 +74,7 @@ namespace osu.Game.Rulesets.Catch.Tests.Mods
                            StartTime = 5000,
                        }
                    },
-                    Breaks = new List<BreakPeriod>
+                    Breaks =
                    {
                        new BreakPeriod(2000, 4000),
                    }
@@ -0,0 +1,210 @@
+osu file format v14
+
+[General]
+AudioFilename: audio.mp3
+AudioLeadIn: 0
+PreviewTime: 65316
+Countdown: 0
+SampleSet: Soft
+StackLeniency: 0.7
+Mode: 2
+LetterboxInBreaks: 0
+WidescreenStoryboard: 0
+
+[Editor]
+DistanceSpacing: 1.4
+BeatDivisor: 4
+GridSize: 8
+TimelineZoom: 1.4
+
+[Metadata]
+Title:Nanairo Symphony -TV Size-
+TitleUnicode:七色シンフォニー -TV Size-
+Artist:Coalamode.
+ArtistUnicode:コアラモード．
+Creator:Ascendance
+Version:Aru's Cup
+Source:四月は君の嘘
+Tags:shigatsu wa kimi no uso your lie in april opening arusamour tenshichan [superstar]
+BeatmapID:1041052
+BeatmapSetID:488149
+
+[Difficulty]
+HPDrainRate:3
+CircleSize:2.5
+OverallDifficulty:6
+ApproachRate:6
+SliderMultiplier:1.02
+SliderTickRate:2
+
+[Events]
+//Background and Video events
+Video,500,"forty.avi"
+0,0,"cropped-1366-768-647733.jpg",0,0
+//Break Periods
+//Storyboard Layer 0 (Background)
+//Storyboard Layer 1 (Fail)
+//Storyboard Layer 2 (Pass)
+//Storyboard Layer 3 (Foreground)
+//Storyboard Sound Samples
+
+[TimingPoints]
+1155,387.096774193548,4,2,1,50,1,0
+15284,-100,4,2,1,60,0,0
+16638,-100,4,2,1,50,0,0
+41413,-100,4,2,1,60,0,0
+59993,-100,4,2,1,65,0,0
+66187,-100,4,2,1,70,0,1
+87284,-100,4,2,1,60,0,1
+87864,-100,4,2,1,70,0,0
+87961,-100,4,2,1,50,0,0
+88638,-100,4,2,1,30,0,0
+89413,-100,4,2,1,10,0,0
+89800,-100,4,2,1,5,0,0
+
+
+[Colours]
+Combo1 : 255,128,64
+Combo2 : 0,128,255
+Combo3 : 255,128,192
+Combo4 : 0,128,192
+
+[HitObjects]
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@@ -0,0 +1 @@
+{"Mappings":[{"StartTime":265568.0,"Objects":[{"StartTime":265568.0,"Position":486.0,"HyperDash":false},{"StartTime":265658.0,"Position":465.1873,"HyperDash":false},{"StartTime":265749.0,"Position":463.208435,"HyperDash":false},{"StartTime":265840.0,"Position":465.146484,"HyperDash":false},{"StartTime":265967.0,"Position":459.5862,"HyperDash":false}]}]}
@@ -0,0 +1,238 @@
+osu file format v14
+
+[General]
+AudioFilename: audio.mp3
+AudioLeadIn: 0
+PreviewTime: 226943
+Countdown: 0
+SampleSet: Soft
+StackLeniency: 0.7
+Mode: 2
+LetterboxInBreaks: 0
+WidescreenStoryboard: 1
+
+[Editor]
+Bookmarks: 85568,86768,90968,265568
+DistanceSpacing: 0.9
+BeatDivisor: 12
+GridSize: 16
+TimelineZoom: 1
+
+[Metadata]
+Title:Snow
+TitleUnicode:Snow
+Artist:Ricky Montgomery
+ArtistUnicode:Ricky Montgomery
+Creator:Crowley
+Version:Bury Me Six Feet in Snow
+Source:
+Tags:indie the honeysticks alternative english
+BeatmapID:2062131
+BeatmapSetID:971028
+
+[Difficulty]
+HPDrainRate:6
+CircleSize:4.2
+OverallDifficulty:8.3
+ApproachRate:8.3
+SliderMultiplier:3.59999990463257
+SliderTickRate:1
+
+[Events]
+//Background and Video events
+0,0,"me.jpg",0,0
+//Break Periods
+//Storyboard Layer 0 (Background)
+//Storyboard Layer 1 (Fail)
+//Storyboard Layer 2 (Pass)
+//Storyboard Layer 3 (Foreground)
+//Storyboard Layer 4 (Overlay)
+//Storyboard Sound Samples
+
+[TimingPoints]
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+
+
+[Colours]
+Combo1 : 255,128,128
+Combo2 : 72,72,255
+Combo3 : 192,192,192
+Combo4 : 255,136,79
+
+[HitObjects]
+486,179,265568,6,0,P|461:174|454:174,1,26.999997997284,6|0,1:2|0:0,0:0:0:0:
@@ -0,0 +1,36 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Testing;
+using osu.Game.Rulesets.Catch.Beatmaps;
+using osu.Game.Rulesets.Catch.UI;
+using osu.Game.Scoring;
+using osu.Game.Tests.Visual;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Catch.Tests
+{
+    public partial class TestSceneCatchReplayHandling : OsuManualInputManagerTestScene
+    {
+        [Test]
+        public void TestReplayDetach()
+        {
+            DrawableCatchRuleset drawableRuleset = null!;
+            float catcherPosition = 0;
+
+            AddStep("create drawable ruleset", () => Child = drawableRuleset = new DrawableCatchRuleset(new CatchRuleset(), new CatchBeatmap(), []));
+            AddStep("attach replay", () => drawableRuleset.SetReplayScore(new Score()));
+            AddStep("store catcher position", () => catcherPosition = drawableRuleset.ChildrenOfType<Catcher>().Single().X);
+            AddStep("hold down left", () => InputManager.PressKey(Key.Left));
+            AddAssert("catcher didn't move", () => drawableRuleset.ChildrenOfType<Catcher>().Single().X, () => Is.EqualTo(catcherPosition));
+            AddStep("release left", () => InputManager.ReleaseKey(Key.Left));
+
+            AddStep("detach replay", () => drawableRuleset.SetReplayScore(null));
+            AddStep("hold down left", () => InputManager.PressKey(Key.Left));
+            AddUntilStep("catcher moved", () => drawableRuleset.ChildrenOfType<Catcher>().Single().X, () => Is.Not.EqualTo(catcherPosition));
+            AddStep("release left", () => InputManager.ReleaseKey(Key.Left));
+        }
+    }
+}
@@ -45,7 +45,7 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                        LegacyConvertedY = yPositionData?.Y ?? CatchHitObject.DEFAULT_LEGACY_CONVERT_Y,
                        // prior to v8, speed multipliers don't adjust for how many ticks are generated over the same distance.
                        // this results in more (or less) ticks being generated in <v8 maps for the same time duration.
-                        TickDistanceMultiplier = beatmap.BeatmapInfo.BeatmapVersion < 8 ? 1 : ((LegacyControlPointInfo)beatmap.ControlPointInfo).DifficultyPointAt(obj.StartTime).SliderVelocity,
+                        TickDistanceMultiplier = beatmap.BeatmapInfo.BeatmapVersion < 8 ? 1f / ((LegacyControlPointInfo)beatmap.ControlPointInfo).DifficultyPointAt(obj.StartTime).SliderVelocity : 1,
                        SliderVelocityMultiplier = sliderVelocityData?.SliderVelocityMultiplier ?? 1
                    }.Yield();

@@ -118,7 +118,11 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
            float offsetPosition = hitObject.OriginalX;
            double startTime = hitObject.StartTime;

-            if (lastPosition == null)
+            if (lastPosition == null ||
+                // some objects can get assigned position zero, making stable incorrectly go inside this if branch on the next object. to maintain behaviour and compatibility, do the same here.
+                // reference: https://github.com/peppy/osu-stable-reference/blob/3ea48705eb67172c430371dcfc8a16a002ed0d3d/osu!/GameplayElements/HitObjects/Fruits/HitFactoryFruits.cs#L45-L50
+                // todo: should be revisited and corrected later probably.
+                lastPosition == 0)
            {
                lastPosition = offsetPosition;
                lastStartTime = startTime;
@@ -3,7 +3,6 @@

 using System;
 using System.Collections.Generic;
-using osu.Framework.Extensions.EnumExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Input.Bindings;
@@ -29,6 +28,7 @@ using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.Scoring.Legacy;
 using osu.Game.Rulesets.UI;
 using osu.Game.Scoring;
+using osu.Game.Screens.Edit.Setup;
 using osu.Game.Screens.Ranking.Statistics;
 using osu.Game.Skinning;

@@ -62,43 +62,43 @@ namespace osu.Game.Rulesets.Catch

        public override IEnumerable<Mod> ConvertFromLegacyMods(LegacyMods mods)
        {
-            if (mods.HasFlagFast(LegacyMods.Nightcore))
+            if (mods.HasFlag(LegacyMods.Nightcore))
                yield return new CatchModNightcore();
-            else if (mods.HasFlagFast(LegacyMods.DoubleTime))
+            else if (mods.HasFlag(LegacyMods.DoubleTime))
                yield return new CatchModDoubleTime();

-            if (mods.HasFlagFast(LegacyMods.Perfect))
+            if (mods.HasFlag(LegacyMods.Perfect))
                yield return new CatchModPerfect();
-            else if (mods.HasFlagFast(LegacyMods.SuddenDeath))
+            else if (mods.HasFlag(LegacyMods.SuddenDeath))
                yield return new CatchModSuddenDeath();

-            if (mods.HasFlagFast(LegacyMods.Cinema))
+            if (mods.HasFlag(LegacyMods.Cinema))
                yield return new CatchModCinema();
-            else if (mods.HasFlagFast(LegacyMods.Autoplay))
+            else if (mods.HasFlag(LegacyMods.Autoplay))
                yield return new CatchModAutoplay();

-            if (mods.HasFlagFast(LegacyMods.Easy))
+            if (mods.HasFlag(LegacyMods.Easy))
                yield return new CatchModEasy();

-            if (mods.HasFlagFast(LegacyMods.Flashlight))
+            if (mods.HasFlag(LegacyMods.Flashlight))
                yield return new CatchModFlashlight();

-            if (mods.HasFlagFast(LegacyMods.HalfTime))
+            if (mods.HasFlag(LegacyMods.HalfTime))
                yield return new CatchModHalfTime();

-            if (mods.HasFlagFast(LegacyMods.HardRock))
+            if (mods.HasFlag(LegacyMods.HardRock))
                yield return new CatchModHardRock();

-            if (mods.HasFlagFast(LegacyMods.Hidden))
+            if (mods.HasFlag(LegacyMods.Hidden))
                yield return new CatchModHidden();

-            if (mods.HasFlagFast(LegacyMods.NoFail))
+            if (mods.HasFlag(LegacyMods.NoFail))
                yield return new CatchModNoFail();

-            if (mods.HasFlagFast(LegacyMods.Relax))
+            if (mods.HasFlag(LegacyMods.Relax))
                yield return new CatchModRelax();

-            if (mods.HasFlagFast(LegacyMods.ScoreV2))
+            if (mods.HasFlag(LegacyMods.ScoreV2))
                yield return new ModScoreV2();
        }

@@ -223,6 +223,12 @@ namespace osu.Game.Rulesets.Catch

        public override HitObjectComposer CreateHitObjectComposer() => new CatchHitObjectComposer(this);

+        public override IEnumerable<SetupSection> CreateEditorSetupSections() =>
+        [
+            new DifficultySection(),
+            new ColoursSection(),
+        ];
+
        public override IBeatmapVerifier CreateBeatmapVerifier() => new CatchBeatmapVerifier();

        public override StatisticItem[] CreateStatisticsForScore(ScoreInfo score, IBeatmap playableBeatmap)
@@ -11,9 +11,5 @@ namespace osu.Game.Rulesets.Catch
            : base(component)
        {
        }
-
-        protected override string RulesetPrefix => "catch"; // todo: use CatchRuleset.SHORT_NAME;
-
-        protected override string ComponentName => Component.ToString().ToLowerInvariant();
    }
 }
@@ -2,22 +2,21 @@
 // See the LICENCE file in the repository root for full licence text.

 using System;
-using System.Collections.Generic;
 using System.Linq;
 using osu.Game.Rulesets.Difficulty;
 using osu.Game.Rulesets.Mods;
-using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
+using osu.Game.Scoring.Legacy;

 namespace osu.Game.Rulesets.Catch.Difficulty
 {
    public class CatchPerformanceCalculator : PerformanceCalculator
    {
-        private int fruitsHit;
-        private int ticksHit;
-        private int tinyTicksHit;
-        private int tinyTicksMissed;
-        private int misses;
+        private int num300;
+        private int num100;
+        private int num50;
+        private int numKatu;
+        private int numMiss;

        public CatchPerformanceCalculator()
            : base(new CatchRuleset())
@@ -28,11 +27,11 @@ namespace osu.Game.Rulesets.Catch.Difficulty
        {
            var catchAttributes = (CatchDifficultyAttributes)attributes;

-            fruitsHit = score.Statistics.GetValueOrDefault(HitResult.Great);
-            ticksHit = score.Statistics.GetValueOrDefault(HitResult.LargeTickHit);
-            tinyTicksHit = score.Statistics.GetValueOrDefault(HitResult.SmallTickHit);
-            tinyTicksMissed = score.Statistics.GetValueOrDefault(HitResult.SmallTickMiss);
-            misses = score.Statistics.GetValueOrDefault(HitResult.Miss);
+            num300 = score.GetCount300() ?? 0; // HitResult.Great
+            num100 = score.GetCount100() ?? 0; // HitResult.LargeTickHit
+            num50 = score.GetCount50() ?? 0; // HitResult.SmallTickHit
+            numKatu = score.GetCountKatu() ?? 0; // HitResult.SmallTickMiss
+            numMiss = score.GetCountMiss() ?? 0; // HitResult.Miss PLUS HitResult.LargeTickMiss

            // We are heavily relying on aim in catch the beat
            double value = Math.Pow(5.0 * Math.Max(1.0, catchAttributes.StarRating / 0.0049) - 4.0, 2.0) / 100000.0;
@@ -45,7 +44,7 @@ namespace osu.Game.Rulesets.Catch.Difficulty
                (numTotalHits > 2500 ? Math.Log10(numTotalHits / 2500.0) * 0.475 : 0.0);
            value *= lengthBonus;

-            value *= Math.Pow(0.97, misses);
+            value *= Math.Pow(0.97, numMiss);

            // Combo scaling
            if (catchAttributes.MaxCombo > 0)
@@ -77,7 +76,7 @@ namespace osu.Game.Rulesets.Catch.Difficulty
            value *= Math.Pow(accuracy(), 5.5);

            if (score.Mods.Any(m => m is ModNoFail))
-                value *= 0.90;
+                value *= Math.Max(0.90, 1.0 - 0.02 * numMiss);

            return new CatchPerformanceAttributes
            {
@@ -86,8 +85,8 @@ namespace osu.Game.Rulesets.Catch.Difficulty
        }

        private double accuracy() => totalHits() == 0 ? 0 : Math.Clamp((double)totalSuccessfulHits() / totalHits(), 0, 1);
-        private int totalHits() => tinyTicksHit + ticksHit + fruitsHit + misses + tinyTicksMissed;
-        private int totalSuccessfulHits() => tinyTicksHit + ticksHit + fruitsHit;
-        private int totalComboHits() => misses + ticksHit + fruitsHit;
+        private int totalHits() => num50 + num100 + num300 + numMiss + numKatu;
+        private int totalSuccessfulHits() => num50 + num100 + num300;
+        private int totalComboHits() => numMiss + num100 + num300;
    }
 }
@@ -49,7 +49,7 @@ namespace osu.Game.Rulesets.Catch.Edit.Blueprints
        {
            base.LoadComplete();

-            inputManager = GetContainingInputManager();
+            inputManager = GetContainingInputManager()!;

            BeginPlacement();
        }
@@ -13,7 +13,8 @@ namespace osu.Game.Rulesets.Catch.Edit
    {
        private readonly List<ICheck> checks = new List<ICheck>
        {
-            new CheckBananaShowerGap()
+            new CheckBananaShowerGap(),
+            new CheckCatchAbnormalDifficultySettings(),
        };

        public IEnumerable<Issue> Run(BeatmapVerifierContext context)
@@ -5,7 +5,6 @@ using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
-using osu.Framework.Extensions.EnumExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
@@ -121,7 +120,7 @@ namespace osu.Game.Rulesets.Catch.Edit

            result.ScreenSpacePosition.X = screenSpacePosition.X;

-            if (snapType.HasFlagFast(SnapType.RelativeGrids))
+            if (snapType.HasFlag(SnapType.RelativeGrids))
            {
                if (distanceSnapGrid.IsPresent && distanceSnapGrid.GetSnappedPosition(result.ScreenSpacePosition) is SnapResult snapResult &&
                    Vector2.Distance(snapResult.ScreenSpacePosition, result.ScreenSpacePosition) < distance_snap_radius)
@@ -76,21 +76,38 @@ namespace osu.Game.Rulesets.Catch.Edit

        public override bool HandleReverse()
        {
+            var hitObjects = EditorBeatmap.SelectedHitObjects
+                                          .OfType<CatchHitObject>()
+                                          .OrderBy(obj => obj.StartTime)
+                                          .ToList();
+
            double selectionStartTime = SelectedItems.Min(h => h.StartTime);
            double selectionEndTime = SelectedItems.Max(h => h.GetEndTime());

-            EditorBeatmap.PerformOnSelection(hitObject =>
-            {
-                hitObject.StartTime = selectionEndTime - (hitObject.GetEndTime() - selectionStartTime);
+            // the expectation is that even if the objects themselves are reversed temporally,
+            // the position of new combos in the selection should remain the same.
+            // preserve it for later before doing the reversal.
+            var newComboOrder = hitObjects.Select(obj => obj.NewCombo).ToList();

-                if (hitObject is JuiceStream juiceStream)
+            foreach (var h in hitObjects)
+            {
+                h.StartTime = selectionEndTime - (h.GetEndTime() - selectionStartTime);
+
+                if (h is JuiceStream juiceStream)
                {
                    juiceStream.Path.Reverse(out Vector2 positionalOffset);
                    juiceStream.OriginalX += positionalOffset.X;
                    juiceStream.LegacyConvertedY += positionalOffset.Y;
                    EditorBeatmap.Update(juiceStream);
                }
-            });
+            }
+
+            // re-order objects by start time again after reversing, and restore new combo flag positioning
+            hitObjects = hitObjects.OrderBy(obj => obj.StartTime).ToList();
+
+            for (int i = 0; i < hitObjects.Count; ++i)
+                hitObjects[i].NewCombo = newComboOrder[i];
+
            return true;
        }

@@ -0,0 +1,39 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks;
+using osu.Game.Rulesets.Edit.Checks.Components;
+
+namespace osu.Game.Rulesets.Catch.Edit.Checks
+{
+    public class CheckCatchAbnormalDifficultySettings : CheckAbnormalDifficultySettings
+    {
+        public override CheckMetadata Metadata => new CheckMetadata(CheckCategory.Settings, "Checks catch relevant settings");
+
+        public override IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            var diff = context.Beatmap.Difficulty;
+            Issue? issue;
+
+            if (HasMoreThanOneDecimalPlace("Approach rate", diff.ApproachRate, out issue))
+                yield return issue;
+
+            if (OutOfRange("Approach rate", diff.ApproachRate, out issue))
+                yield return issue;
+
+            if (HasMoreThanOneDecimalPlace("Circle size", diff.CircleSize, out issue))
+                yield return issue;
+
+            if (OutOfRange("Circle size", diff.CircleSize, out issue))
+                yield return issue;
+
+            if (HasMoreThanOneDecimalPlace("Drain rate", diff.DrainRate, out issue))
+                yield return issue;
+
+            if (OutOfRange("Drain rate", diff.DrainRate, out issue))
+                yield return issue;
+        }
+    }
+}
@@ -12,6 +12,7 @@ using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Legacy;
 using osu.Game.Rulesets.Objects.Types;

 namespace osu.Game.Rulesets.Catch.Objects
@@ -29,7 +30,6 @@ namespace osu.Game.Rulesets.Catch.Objects

        public BindableNumber<double> SliderVelocityMultiplierBindable { get; } = new BindableDouble(1)
        {
-            Precision = 0.01,
            MinValue = 0.1,
            MaxValue = 10
        };
@@ -47,16 +47,10 @@ namespace osu.Game.Rulesets.Catch.Objects
        public double TickDistanceMultiplier = 1;

        [JsonIgnore]
-        private double velocityFactor;
+        public double Velocity { get; private set; }

        [JsonIgnore]
-        private double tickDistanceFactor;
-
-        [JsonIgnore]
-        public double Velocity => velocityFactor * SliderVelocityMultiplier;
-
-        [JsonIgnore]
-        public double TickDistance => tickDistanceFactor * TickDistanceMultiplier;
+        public double TickDistance { get; private set; }

        /// <summary>
        /// The length of one span of this <see cref="JuiceStream"/>.
@@ -69,14 +63,21 @@ namespace osu.Game.Rulesets.Catch.Objects

            TimingControlPoint timingPoint = controlPointInfo.TimingPointAt(StartTime);

-            velocityFactor = base_scoring_distance * difficulty.SliderMultiplier / timingPoint.BeatLength;
-            tickDistanceFactor = base_scoring_distance * difficulty.SliderMultiplier / difficulty.SliderTickRate;
+            Velocity = base_scoring_distance * difficulty.SliderMultiplier / LegacyRulesetExtensions.GetPrecisionAdjustedBeatLength(this, timingPoint, CatchRuleset.SHORT_NAME);
+
+            // WARNING: this is intentionally not computed as `BASE_SCORING_DISTANCE * difficulty.SliderMultiplier`
+            // for backwards compatibility reasons (intentionally introducing floating point errors to match stable).
+            double scoringDistance = Velocity * timingPoint.BeatLength;
+
+            TickDistance = scoringDistance / difficulty.SliderTickRate * TickDistanceMultiplier;
        }

        protected override void CreateNestedHitObjects(CancellationToken cancellationToken)
        {
            base.CreateNestedHitObjects(cancellationToken);

+            this.PopulateNodeSamples();
+
            var dropletSamples = Samples.Select(s => s.With(@"slidertick")).ToList();

            int nodeIndex = 0;
@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.Linq;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Scoring;

@@ -21,6 +22,23 @@ namespace osu.Game.Rulesets.Catch.Scoring

        protected override IEnumerable<HitObject> EnumerateNestedHitObjects(HitObject hitObject) => Enumerable.Empty<HitObject>();

+        protected override bool CheckDefaultFailCondition(JudgementResult result)
+        {
+            // matches stable.
+            // see: https://github.com/peppy/osu-stable-reference/blob/46cd3a10af7cc6cc96f4eba92ef1812dc8c3a27e/osu!/GameModes/Play/Rulesets/Ruleset.cs#L967
+            // the above early-return skips the failure check at the end of the same method:
+            // https://github.com/peppy/osu-stable-reference/blob/46cd3a10af7cc6cc96f4eba92ef1812dc8c3a27e/osu!/GameModes/Play/Rulesets/Ruleset.cs#L1232
+            // making it impossible to fail on a tiny droplet regardless of result.
+            if (result.Type == HitResult.SmallTickMiss)
+                return false;
+
+            // on stable, banana showers don't exist as concrete objects themselves, so they can't cause a fail.
+            if (result.HitObject is BananaShower)
+                return false;
+
+            return base.CheckDefaultFailCondition(result);
+        }
+
        protected override double GetHealthIncreaseFor(HitObject hitObject, HitResult result)
        {
            double increase = 0;
@@ -84,7 +84,7 @@ namespace osu.Game.Rulesets.Catch.UI
        {
            base.Update();

-            var replayState = (GetContainingInputManager().CurrentState as RulesetInputManagerInputState<CatchAction>)?.LastReplayState as CatchFramedReplayInputHandler.CatchReplayState;
+            var replayState = (GetContainingInputManager()!.CurrentState as RulesetInputManagerInputState<CatchAction>)?.LastReplayState as CatchFramedReplayInputHandler.CatchReplayState;

            SetCatcherPosition(
                replayState?.CatcherX ??
@@ -16,6 +16,8 @@ using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Scoring;
+using osu.Game.Screens.Play;
+using osuTK;

 namespace osu.Game.Rulesets.Catch.UI
 {
@@ -52,5 +54,7 @@ namespace osu.Game.Rulesets.Catch.UI
        protected override PassThroughInputManager CreateInputManager() => new CatchInputManager(Ruleset.RulesetInfo);

        public override DrawableHitObject<CatchHitObject>? CreateDrawableRepresentation(CatchHitObject h) => null;
+
+        protected override ResumeOverlay CreateResumeOverlay() => new DelayedResumeOverlay { Scale = new Vector2(0.65f) };
    }
 }
@@ -0,0 +1,63 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Tests.Beatmaps;
+using osu.Game.Rulesets.Mania.Edit.Checks;
+using System.Linq;
+
+namespace osu.Game.Rulesets.Mania.Tests.Editor.Checks
+{
+    [TestFixture]
+    public class CheckKeyCountTest
+    {
+        private CheckKeyCount check = null!;
+
+        private IBeatmap beatmap = null!;
+
+        [SetUp]
+        public void Setup()
+        {
+            check = new CheckKeyCount();
+
+            beatmap = new Beatmap<HitObject>
+            {
+                BeatmapInfo = new BeatmapInfo
+                {
+                    Ruleset = new ManiaRuleset().RulesetInfo
+                }
+            };
+        }
+
+        [Test]
+        public void TestKeycountFour()
+        {
+            beatmap.Difficulty.CircleSize = 4;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(0));
+        }
+
+        [Test]
+        public void TestKeycountSmallerThanFour()
+        {
+            beatmap.Difficulty.CircleSize = 1;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckKeyCount.IssueTemplateKeycountTooLow);
+        }
+
+        private BeatmapVerifierContext getContext()
+        {
+            return new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+        }
+    }
+}
@@ -0,0 +1,121 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mania.Edit.Checks;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Tests.Beatmaps;
+
+namespace osu.Game.Rulesets.Mania.Tests.Editor.Checks
+{
+    [TestFixture]
+    public class CheckManiaAbnormalDifficultySettingsTest
+    {
+        private CheckManiaAbnormalDifficultySettings check = null!;
+
+        private readonly IBeatmap beatmap = new Beatmap<HitObject>();
+
+        [SetUp]
+        public void Setup()
+        {
+            check = new CheckManiaAbnormalDifficultySettings();
+
+            beatmap.BeatmapInfo.Ruleset = new ManiaRuleset().RulesetInfo;
+            beatmap.Difficulty = new BeatmapDifficulty
+            {
+                OverallDifficulty = 5,
+                DrainRate = 5,
+            };
+        }
+
+        [Test]
+        public void TestNormalSettings()
+        {
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(0));
+        }
+
+        [Test]
+        public void TestOverallDifficultyTwoDecimals()
+        {
+            beatmap.Difficulty.OverallDifficulty = 5.55f;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateMoreThanOneDecimal);
+        }
+
+        [Test]
+        public void TestDrainRateTwoDecimals()
+        {
+            beatmap.Difficulty.DrainRate = 5.55f;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateMoreThanOneDecimal);
+        }
+
+        [Test]
+        public void TestOverallDifficultyUnder()
+        {
+            beatmap.Difficulty.OverallDifficulty = -10;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        [Test]
+        public void TestDrainRateUnder()
+        {
+            beatmap.Difficulty.DrainRate = -10;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        [Test]
+        public void TestOverallDifficultyOver()
+        {
+            beatmap.Difficulty.OverallDifficulty = 20;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        [Test]
+        public void TestDrainRateOver()
+        {
+            beatmap.Difficulty.DrainRate = 20;
+
+            var context = getContext();
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckAbnormalDifficultySettings.IssueTemplateOutOfRange);
+        }
+
+        private BeatmapVerifierContext getContext()
+        {
+            return new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+        }
+    }
+}
@@ -1,13 +1,18 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.

+using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Testing;
+using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Configuration;
 using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Screens.Edit.Timing;
 using osu.Game.Tests.Visual;
+using osuTK.Input;

 namespace osu.Game.Rulesets.Mania.Tests.Editor
 {
@@ -30,5 +35,43 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor
            var config = (ManiaRulesetConfigManager)RulesetConfigs.GetConfigFor(Ruleset.Value.CreateInstance()).AsNonNull();
            config.BindWith(ManiaRulesetSetting.ScrollDirection, direction);
        }
+
+        [Test]
+        public void TestReloadOnBPMChange()
+        {
+            HitObjectComposer oldComposer = null!;
+
+            AddStep("store composer", () => oldComposer = this.ChildrenOfType<HitObjectComposer>().Single());
+            AddUntilStep("composer stored", () => oldComposer, () => Is.Not.Null);
+            AddStep("switch to timing tab", () => InputManager.Key(Key.F3));
+            AddUntilStep("wait for loaded", () => this.ChildrenOfType<TimingAdjustButton>().ElementAtOrDefault(1), () => Is.Not.Null);
+            AddStep("change timing point BPM", () =>
+            {
+                var bpmControl = this.ChildrenOfType<TimingAdjustButton>().ElementAt(1);
+                InputManager.MoveMouseTo(bpmControl);
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddStep("switch back to composer", () => InputManager.Key(Key.F1));
+            AddUntilStep("composer reloaded", () =>
+            {
+                var composer = this.ChildrenOfType<HitObjectComposer>().SingleOrDefault();
+                return composer != null && composer != oldComposer;
+            });
+
+            AddStep("store composer", () => oldComposer = this.ChildrenOfType<HitObjectComposer>().Single());
+            AddUntilStep("composer stored", () => oldComposer, () => Is.Not.Null);
+            AddStep("undo", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.Z);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+            AddUntilStep("composer reloaded", () =>
+            {
+                var composer = this.ChildrenOfType<HitObjectComposer>().SingleOrDefault();
+                return composer != null && composer != oldComposer;
+            });
+        }
    }
 }
@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.

+using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Allocation;
@@ -17,6 +18,7 @@ using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Screens.Edit;
+using osu.Game.Screens.Edit.Compose.Components;
 using osu.Game.Tests.Visual;
 using osuTK;

@@ -84,6 +86,7 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor
    public partial class TestHitObjectComposer : HitObjectComposer
    {
        public override Playfield Playfield { get; }
+        public override ComposeBlueprintContainer BlueprintContainer => throw new NotImplementedException();
        public override IEnumerable<DrawableHitObject> HitObjects => Enumerable.Empty<DrawableHitObject>();
        public override bool CursorInPlacementArea => false;

@@ -100,7 +103,7 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor

        public override SnapResult FindSnappedPositionAndTime(Vector2 screenSpacePosition, SnapType snapType = SnapType.All)
        {
-            throw new System.NotImplementedException();
+            throw new NotImplementedException();
        }
    }
 }
@@ -0,0 +1,45 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Testing;
+using osu.Game.Graphics.UserInterfaceV2;
+using osu.Game.Overlays;
+using osu.Game.Screens.Edit;
+using osu.Game.Screens.Edit.Setup;
+using osu.Game.Tests.Visual;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Mania.Tests.Editor
+{
+    public partial class TestSceneManiaEditorSaving : EditorSavingTestScene
+    {
+        protected override Ruleset CreateRuleset() => new ManiaRuleset();
+
+        [Test]
+        public void TestKeyCountChange()
+        {
+            LabelledSliderBar<float> keyCount = null!;
+
+            AddStep("go to setup screen", () => InputManager.Key(Key.F4));
+            AddUntilStep("retrieve key count slider", () => keyCount = Editor.ChildrenOfType<SetupScreen>().Single().ChildrenOfType<LabelledSliderBar<float>>().First(), () => Is.Not.Null);
+            AddAssert("key count is 5", () => keyCount.Current.Value, () => Is.EqualTo(5));
+            AddStep("change key count to 8", () =>
+            {
+                keyCount.Current.Value = 8;
+            });
+            AddUntilStep("dialog visible", () => Game.ChildrenOfType<IDialogOverlay>().SingleOrDefault()?.CurrentDialog, Is.InstanceOf<ReloadEditorDialog>);
+            AddStep("refuse", () => InputManager.Key(Key.Number2));
+            AddAssert("key count is 5", () => keyCount.Current.Value, () => Is.EqualTo(5));
+
+            AddStep("change key count to 8 again", () =>
+            {
+                keyCount.Current.Value = 8;
+            });
+            AddUntilStep("dialog visible", () => Game.ChildrenOfType<IDialogOverlay>().Single().CurrentDialog, Is.InstanceOf<ReloadEditorDialog>);
+            AddStep("acquiesce", () => InputManager.Key(Key.Number1));
+            AddUntilStep("beatmap became 8K", () => Game.Beatmap.Value.BeatmapInfo.Difficulty.CircleSize, () => Is.EqualTo(8));
+        }
+    }
+}
@@ -186,8 +186,106 @@ namespace osu.Game.Rulesets.Mania.Tests.Editor
            AddAssert("head note positioned correctly", () => Precision.AlmostEquals(holdNote.ScreenSpaceDrawQuad.BottomLeft, holdNote.Head.ScreenSpaceDrawQuad.BottomLeft));
            AddAssert("tail note positioned correctly", () => Precision.AlmostEquals(holdNote.ScreenSpaceDrawQuad.TopLeft, holdNote.Tail.ScreenSpaceDrawQuad.BottomLeft));

-            AddAssert("head blueprint positioned correctly", () => this.ChildrenOfType<EditNotePiece>().ElementAt(0).DrawPosition == holdNote.Head.DrawPosition);
-            AddAssert("tail blueprint positioned correctly", () => this.ChildrenOfType<EditNotePiece>().ElementAt(1).DrawPosition == holdNote.Tail.DrawPosition);
+            AddAssert("head blueprint positioned correctly", () => this.ChildrenOfType<EditHoldNoteEndPiece>().ElementAt(0).DrawPosition == holdNote.Head.DrawPosition);
+            AddAssert("tail blueprint positioned correctly", () => this.ChildrenOfType<EditHoldNoteEndPiece>().ElementAt(1).DrawPosition == holdNote.Tail.DrawPosition);
+        }
+
+        [Test]
+        public void TestDragHoldNoteHead()
+        {
+            setScrollStep(ScrollingDirection.Down);
+
+            HoldNote holdNote = null;
+            AddStep("setup beatmap", () =>
+            {
+                composer.EditorBeatmap.Clear();
+                composer.EditorBeatmap.Add(holdNote = new HoldNote
+                {
+                    Column = 1,
+                    StartTime = 250,
+                    EndTime = 750,
+                });
+            });
+
+            DrawableHoldNote drawableHoldNote = null;
+            EditHoldNoteEndPiece headPiece = null;
+
+            AddStep("select blueprint", () =>
+            {
+                drawableHoldNote = this.ChildrenOfType<DrawableHoldNote>().Single();
+                InputManager.MoveMouseTo(drawableHoldNote);
+                InputManager.Click(MouseButton.Left);
+            });
+            AddStep("grab hold note head", () =>
+            {
+                headPiece = this.ChildrenOfType<EditHoldNoteEndPiece>().First();
+                InputManager.MoveMouseTo(headPiece);
+                InputManager.PressButton(MouseButton.Left);
+            });
+
+            AddStep("drag head downwards", () =>
+            {
+                InputManager.MoveMouseTo(headPiece, new Vector2(0, 100));
+                InputManager.ReleaseButton(MouseButton.Left);
+            });
+
+            AddAssert("start time moved back", () => holdNote!.StartTime, () => Is.LessThan(250));
+            AddAssert("end time unchanged", () => holdNote.EndTime, () => Is.EqualTo(750));
+
+            AddAssert("head note positioned correctly", () => Precision.AlmostEquals(drawableHoldNote.ScreenSpaceDrawQuad.BottomLeft, drawableHoldNote.Head.ScreenSpaceDrawQuad.BottomLeft));
+            AddAssert("tail note positioned correctly", () => Precision.AlmostEquals(drawableHoldNote.ScreenSpaceDrawQuad.TopLeft, drawableHoldNote.Tail.ScreenSpaceDrawQuad.BottomLeft));
+
+            AddAssert("head blueprint positioned correctly", () => this.ChildrenOfType<EditHoldNoteEndPiece>().ElementAt(0).DrawPosition == drawableHoldNote.Head.DrawPosition);
+            AddAssert("tail blueprint positioned correctly", () => this.ChildrenOfType<EditHoldNoteEndPiece>().ElementAt(1).DrawPosition == drawableHoldNote.Tail.DrawPosition);
+        }
+
+        [Test]
+        public void TestDragHoldNoteTail()
+        {
+            setScrollStep(ScrollingDirection.Down);
+
+            HoldNote holdNote = null;
+            AddStep("setup beatmap", () =>
+            {
+                composer.EditorBeatmap.Clear();
+                composer.EditorBeatmap.Add(holdNote = new HoldNote
+                {
+                    Column = 1,
+                    StartTime = 250,
+                    EndTime = 750,
+                });
+            });
+
+            DrawableHoldNote drawableHoldNote = null;
+            EditHoldNoteEndPiece tailPiece = null;
+
+            AddStep("select blueprint", () =>
+            {
+                drawableHoldNote = this.ChildrenOfType<DrawableHoldNote>().Single();
+                InputManager.MoveMouseTo(drawableHoldNote);
+                InputManager.Click(MouseButton.Left);
+            });
+            AddStep("grab hold note tail", () =>
+            {
+                tailPiece = this.ChildrenOfType<EditHoldNoteEndPiece>().Last();
+                InputManager.MoveMouseTo(tailPiece);
+                InputManager.PressButton(MouseButton.Left);
+            });
+
+            AddStep("drag tail upwards", () =>
+            {
+                InputManager.MoveMouseTo(tailPiece, new Vector2(0, -100));
+                InputManager.ReleaseButton(MouseButton.Left);
+            });
+
+            AddAssert("start time unchanged", () => holdNote!.StartTime, () => Is.EqualTo(250));
+            AddAssert("end time moved forward", () => holdNote.EndTime, () => Is.GreaterThan(750));
+
+            AddAssert("head note positioned correctly", () => Precision.AlmostEquals(drawableHoldNote.ScreenSpaceDrawQuad.BottomLeft, drawableHoldNote.Head.ScreenSpaceDrawQuad.BottomLeft));
+            AddAssert("tail note positioned correctly", () => Precision.AlmostEquals(drawableHoldNote.ScreenSpaceDrawQuad.TopLeft, drawableHoldNote.Tail.ScreenSpaceDrawQuad.BottomLeft));
+
+            AddAssert("head blueprint positioned correctly", () => this.ChildrenOfType<EditHoldNoteEndPiece>().ElementAt(0).DrawPosition == drawableHoldNote.Head.DrawPosition);
+            AddAssert("tail blueprint positioned correctly", () => this.ChildrenOfType<EditHoldNoteEndPiece>().ElementAt(1).DrawPosition == drawableHoldNote.Tail.DrawPosition);
        }

        private void setScrollStep(ScrollingDirection direction)
@@ -0,0 +1,96 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Screens.Edit.Compose.Components;
+using osu.Game.Tests.Beatmaps;
+using osu.Game.Tests.Visual;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Mania.Tests.Editor
+{
+    public partial class TestSceneManiaSelectionHandler : EditorTestScene
+    {
+        protected override Ruleset CreateEditorRuleset() => new ManiaRuleset();
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new TestBeatmap(ruleset, false);
+
+        [Test]
+        public void TestHorizontalFlipOverSelection()
+        {
+            ManiaHitObject first = null!, second = null!, third = null!;
+
+            AddStep("create objects", () =>
+            {
+                EditorBeatmap.Add(first = new Note { StartTime = 250, Column = 2 });
+                EditorBeatmap.Add(second = new HoldNote { StartTime = 750, Duration = 1500, Column = 1 });
+                EditorBeatmap.Add(third = new Note { StartTime = 1250, Column = 3 });
+            });
+
+            AddStep("select everything", () => EditorBeatmap.SelectedHitObjects.AddRange(EditorBeatmap.HitObjects));
+            AddStep("flip horizontally over selection", () =>
+            {
+                InputManager.MoveMouseTo(this.ChildrenOfType<SelectionBoxButton>().First());
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddAssert("first object stayed in place", () => first.Column, () => Is.EqualTo(2));
+            AddAssert("second object flipped", () => second.Column, () => Is.EqualTo(3));
+            AddAssert("third object flipped", () => third.Column, () => Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestHorizontalFlipOverPlayfield()
+        {
+            ManiaHitObject first = null!, second = null!, third = null!;
+
+            AddStep("create objects", () =>
+            {
+                EditorBeatmap.Add(first = new Note { StartTime = 250, Column = 2 });
+                EditorBeatmap.Add(second = new HoldNote { StartTime = 750, Duration = 1500, Column = 1 });
+                EditorBeatmap.Add(third = new Note { StartTime = 1250, Column = 3 });
+            });
+
+            AddStep("select everything", () => EditorBeatmap.SelectedHitObjects.AddRange(EditorBeatmap.HitObjects));
+            AddStep("flip horizontally", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.H);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+
+            AddAssert("first object flipped", () => first.Column, () => Is.EqualTo(1));
+            AddAssert("second object flipped", () => second.Column, () => Is.EqualTo(2));
+            AddAssert("third object flipped", () => third.Column, () => Is.EqualTo(0));
+        }
+
+        [Test]
+        public void TestVerticalFlip()
+        {
+            ManiaHitObject first = null!, second = null!, third = null!;
+
+            AddStep("create objects", () =>
+            {
+                EditorBeatmap.Add(first = new Note { StartTime = 250, Column = 2 });
+                EditorBeatmap.Add(second = new HoldNote { StartTime = 750, Duration = 1500, Column = 1 });
+                EditorBeatmap.Add(third = new Note { StartTime = 1250, Column = 3 });
+            });
+
+            AddStep("select everything", () => EditorBeatmap.SelectedHitObjects.AddRange(EditorBeatmap.HitObjects));
+            AddStep("flip vertically", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.J);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+
+            AddAssert("first object flipped", () => first.StartTime, () => Is.EqualTo(2250));
+            AddAssert("second object flipped", () => second.StartTime, () => Is.EqualTo(250));
+            AddAssert("third object flipped", () => third.StartTime, () => Is.EqualTo(1250));
+        }
+    }
+}
@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.

 using NUnit.Framework;
+using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Scoring;
@@ -27,5 +28,49 @@ namespace osu.Game.Rulesets.Mania.Tests
            // No matter what, mania doesn't have passive HP drain.
            Assert.That(processor.DrainRate, Is.Zero);
        }
+
+        private static readonly object[][] test_cases =
+        [
+            // hitobject, starting HP, fail expected after miss
+            [new Note(), 0.01, true],
+            [new HeadNote(), 0.01, true],
+            [new TailNote(), 0.01, true],
+            [new HoldNoteBody(), 0, true], // hold note break
+            [new HoldNote(), 0, true],
+        ];
+
+        [TestCaseSource(nameof(test_cases))]
+        public void TestFailAfterMinResult(ManiaHitObject hitObject, double startingHealth, bool failExpected)
+        {
+            var healthProcessor = new ManiaHealthProcessor(0);
+            healthProcessor.ApplyBeatmap(new ManiaBeatmap(new StageDefinition(4))
+            {
+                HitObjects = { hitObject }
+            });
+            healthProcessor.Health.Value = startingHealth;
+
+            var result = new JudgementResult(hitObject, hitObject.CreateJudgement());
+            result.Type = result.Judgement.MinResult;
+            healthProcessor.ApplyResult(result);
+
+            Assert.That(healthProcessor.HasFailed, Is.EqualTo(failExpected));
+        }
+
+        [TestCaseSource(nameof(test_cases))]
+        public void TestNoFailAfterMaxResult(ManiaHitObject hitObject, double startingHealth, bool _)
+        {
+            var healthProcessor = new ManiaHealthProcessor(0);
+            healthProcessor.ApplyBeatmap(new ManiaBeatmap(new StageDefinition(4))
+            {
+                HitObjects = { hitObject }
+            });
+            healthProcessor.Health.Value = startingHealth;
+
+            var result = new JudgementResult(hitObject, hitObject.CreateJudgement());
+            result.Type = result.Judgement.MaxResult;
+            healthProcessor.ApplyResult(result);
+
+            Assert.That(healthProcessor.HasFailed, Is.False);
+        }
    }
 }
@@ -2,6 +2,8 @@
 // See the LICENCE file in the repository root for full licence text.

 using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.Timing;
 using osu.Game.Rulesets.Mania.Mods;
 using osu.Game.Tests.Visual;

@@ -17,5 +19,22 @@ namespace osu.Game.Rulesets.Mania.Tests.Mods
            Mod = new ManiaModInvert(),
            PassCondition = () => Player.ScoreProcessor.JudgedHits >= 2
        });
+
+        [Test]
+        public void TestBreaksPreservedOnOriginalBeatmap()
+        {
+            var beatmap = CreateBeatmap(new ManiaRuleset().RulesetInfo);
+            beatmap.Breaks.Clear();
+            beatmap.Breaks.Add(new BreakPeriod(0, 1000));
+
+            var workingBeatmap = new FlatWorkingBeatmap(beatmap);
+
+            var playableWithInvert = workingBeatmap.GetPlayableBeatmap(new ManiaRuleset().RulesetInfo, new[] { new ManiaModInvert() });
+            Assert.That(playableWithInvert.Breaks.Count, Is.Zero);
+
+            var playableWithoutInvert = workingBeatmap.GetPlayableBeatmap(new ManiaRuleset().RulesetInfo);
+            Assert.That(playableWithoutInvert.Breaks.Count, Is.Not.Zero);
+            Assert.That(playableWithoutInvert.Breaks[0], Is.EqualTo(new BreakPeriod(0, 1000)));
+        }
    }
 }
@@ -0,0 +1,643 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Screens;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Replays;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mania.Mods;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Replays;
+using osu.Game.Rulesets.Mania.Scoring;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Replays;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Scoring;
+using osu.Game.Screens.Play;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Mania.Tests.Mods
+{
+    public partial class TestSceneManiaModNoRelease : RateAdjustedBeatmapTestScene
+    {
+        private const double time_before_head = 250;
+        private const double time_head = 1500;
+        private const double time_during_hold_1 = 2500;
+        private const double time_tail = 4000;
+        private const double time_after_tail = 5250;
+
+        private List<JudgementResult> judgementResults = new List<JudgementResult>();
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///  o                           o
+        /// </summary>
+        [Test]
+        public void TestNoInput()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_before_head),
+                new ManiaReplayFrame(time_after_tail),
+            });
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Miss);
+            assertNoteJudgement(HitResult.IgnoreMiss);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///          x           o
+        /// </summary>
+        [Test]
+        public void TestCorrectInput()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail),
+            });
+
+            assertHeadJudgement(HitResult.Perfect);
+            assertTailJudgement(HitResult.Perfect);
+            assertNoteJudgement(HitResult.IgnoreHit);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///          x                   o
+        /// </summary>
+        [Test]
+        public void TestLateRelease()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_after_tail),
+            });
+
+            assertHeadJudgement(HitResult.Perfect);
+            assertTailJudgement(HitResult.Perfect);
+            assertNoteJudgement(HitResult.IgnoreHit);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///  x                           o
+        /// </summary>
+        [Test]
+        public void TestPressTooEarlyAndReleaseAfterTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_before_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_after_tail, ManiaAction.Key1),
+            });
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Miss);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///  x                   o
+        /// </summary>
+        [Test]
+        public void TestPressTooEarlyAndReleaseAtTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_before_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail),
+            });
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Miss);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///  xo      x                   o
+        /// </summary>
+        [Test]
+        public void TestPressTooEarlyThenPressAtStartAndReleaseAfterTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_before_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_before_head + 10),
+                new ManiaReplayFrame(time_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_after_tail),
+            });
+
+            assertHeadJudgement(HitResult.Perfect);
+            assertTailJudgement(HitResult.Perfect);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///  xo      x           o
+        /// </summary>
+        [Test]
+        public void TestPressTooEarlyThenPressAtStartAndReleaseAtTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_before_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_before_head + 10),
+                new ManiaReplayFrame(time_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail),
+            });
+
+            assertHeadJudgement(HitResult.Perfect);
+            assertTailJudgement(HitResult.Perfect);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///          xo                  o
+        /// </summary>
+        [Test]
+        public void TestPressAtStartAndBreak()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_head + 10),
+                new ManiaReplayFrame(time_after_tail),
+            });
+
+            assertHeadJudgement(HitResult.Perfect);
+            assertTailJudgement(HitResult.Miss);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///          xox         o
+        /// </summary>
+        [Test]
+        public void TestPressAtStartThenReleaseAndImmediatelyRepress()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_head + 1),
+                new ManiaReplayFrame(time_head + 2, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail),
+            });
+
+            assertHeadJudgement(HitResult.Perfect);
+            assertComboAtJudgement(0, 1);
+            assertTailJudgement(HitResult.Meh);
+            assertComboAtJudgement(1, 0);
+            assertComboAtJudgement(3, 1);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///          xo  x               o
+        /// </summary>
+        [Test]
+        public void TestPressAtStartThenBreakThenRepressAndReleaseAfterTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_head + 10),
+                new ManiaReplayFrame(time_during_hold_1, ManiaAction.Key1),
+                new ManiaReplayFrame(time_after_tail),
+            });
+
+            assertHeadJudgement(HitResult.Perfect);
+            assertTailJudgement(HitResult.Meh);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///          xo  x       o       o
+        /// </summary>
+        [Test]
+        public void TestPressAtStartThenBreakThenRepressAndReleaseAtTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_head, ManiaAction.Key1),
+                new ManiaReplayFrame(time_head + 10),
+                new ManiaReplayFrame(time_during_hold_1, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail),
+            });
+
+            assertHeadJudgement(HitResult.Perfect);
+            assertTailJudgement(HitResult.Meh);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///             x                o
+        /// </summary>
+        [Test]
+        public void TestPressDuringNoteAndReleaseAfterTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_during_hold_1, ManiaAction.Key1),
+                new ManiaReplayFrame(time_after_tail),
+            });
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Meh);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///             x        o       o
+        /// </summary>
+        [Test]
+        public void TestPressDuringNoteAndReleaseAtTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_during_hold_1, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail),
+            });
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Meh);
+        }
+
+        /// <summary>
+        ///     -----[ ]--------------
+        ///               xo
+        /// </summary>
+        [Test]
+        public void TestPressAndReleaseAfterTailWithCloseByHead()
+        {
+            const int duration = 30;
+
+            var beatmap = new Beatmap<ManiaHitObject>
+            {
+                HitObjects =
+                {
+                    // hold note is very short, to make the head still in range
+                    new HoldNote
+                    {
+                        StartTime = time_head,
+                        Duration = duration,
+                        Column = 0,
+                    }
+                },
+                BeatmapInfo =
+                {
+                    Difficulty = new BeatmapDifficulty { SliderTickRate = 4 },
+                    Ruleset = new ManiaRuleset().RulesetInfo
+                },
+            };
+
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_head + duration + 60, ManiaAction.Key1),
+                new ManiaReplayFrame(time_head + duration + 70),
+            }, beatmap);
+
+            assertHeadJudgement(HitResult.Ok);
+            assertTailJudgement(HitResult.Perfect);
+        }
+
+        /// <summary>
+        ///     -----[ ]-O-------------
+        ///           xo                 o
+        /// </summary>
+        [Test]
+        public void TestPressAndReleaseJustBeforeTailWithNearbyNoteAndCloseByHead()
+        {
+            Note note;
+
+            const int duration = 50;
+
+            var beatmap = new Beatmap<ManiaHitObject>
+            {
+                HitObjects =
+                {
+                    // hold note is very short, to make the head still in range
+                    new HoldNote
+                    {
+                        StartTime = time_head,
+                        Duration = duration,
+                        Column = 0,
+                    },
+                    {
+                        // Next note within tail lenience
+                        note = new Note
+                        {
+                            StartTime = time_head + duration + 10
+                        }
+                    }
+                },
+                BeatmapInfo =
+                {
+                    Difficulty = new BeatmapDifficulty { SliderTickRate = 4 },
+                    Ruleset = new ManiaRuleset().RulesetInfo
+                },
+            };
+
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_head + duration, ManiaAction.Key1),
+                new ManiaReplayFrame(time_head + duration + 10),
+            }, beatmap);
+
+            assertHeadJudgement(HitResult.Good);
+            assertTailJudgement(HitResult.Perfect);
+
+            assertHitObjectJudgement(note, HitResult.Miss);
+        }
+
+        /// <summary>
+        ///     -----[           ]--O--
+        ///                     xo       o
+        /// </summary>
+        [Test]
+        public void TestPressAndReleaseJustBeforeTailWithNearbyNote()
+        {
+            Note note;
+
+            var beatmap = new Beatmap<ManiaHitObject>
+            {
+                HitObjects =
+                {
+                    new HoldNote
+                    {
+                        StartTime = time_head,
+                        Duration = time_tail - time_head,
+                        Column = 0,
+                    },
+                    {
+                        // Next note within tail lenience
+                        note = new Note
+                        {
+                            StartTime = time_tail + 50
+                        }
+                    }
+                },
+                BeatmapInfo =
+                {
+                    Difficulty = new BeatmapDifficulty { SliderTickRate = 4 },
+                    Ruleset = new ManiaRuleset().RulesetInfo
+                },
+            };
+
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_tail - 10, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail),
+            }, beatmap);
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Miss);
+
+            assertHitObjectJudgement(note, HitResult.Good);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///                       xo
+        /// </summary>
+        [Test]
+        public void TestPressAndReleaseJustAfterTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_tail + 20, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail + 30),
+            });
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Meh);
+        }
+
+        /// <summary>
+        ///     -----[           ]--O--
+        ///                       xo     o
+        /// </summary>
+        [Test]
+        public void TestPressAndReleaseJustAfterTailWithNearbyNote()
+        {
+            // Next note within tail lenience
+            Note note = new Note { StartTime = time_tail + 50 };
+
+            var beatmap = new Beatmap<ManiaHitObject>
+            {
+                HitObjects =
+                {
+                    new HoldNote
+                    {
+                        StartTime = time_head,
+                        Duration = time_tail - time_head,
+                        Column = 0,
+                    },
+                    note
+                },
+                BeatmapInfo =
+                {
+                    Difficulty = new BeatmapDifficulty { SliderTickRate = 4 },
+                    Ruleset = new ManiaRuleset().RulesetInfo
+                },
+            };
+
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_tail + 10, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail + 20),
+            }, beatmap);
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Miss);
+
+            assertHitObjectJudgement(note, HitResult.Great);
+        }
+
+        /// <summary>
+        ///     -----[           ]-----
+        ///                      xo      o
+        /// </summary>
+        [Test]
+        public void TestPressAndReleaseAtTail()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(time_tail, ManiaAction.Key1),
+                new ManiaReplayFrame(time_tail + 10),
+            });
+
+            assertHeadJudgement(HitResult.Miss);
+            assertTailJudgement(HitResult.Meh);
+        }
+
+        [Test]
+        public void TestMissReleaseAndHitSecondRelease()
+        {
+            var windows = new ManiaHitWindows();
+            windows.SetDifficulty(10);
+
+            var beatmap = new Beatmap<ManiaHitObject>
+            {
+                HitObjects =
+                {
+                    new HoldNote
+                    {
+                        StartTime = 1000,
+                        Duration = 500,
+                        Column = 0,
+                    },
+                    new HoldNote
+                    {
+                        StartTime = 1000 + 500 + windows.WindowFor(HitResult.Miss) + 10,
+                        Duration = 500,
+                        Column = 0,
+                    },
+                },
+                BeatmapInfo =
+                {
+                    Difficulty = new BeatmapDifficulty
+                    {
+                        SliderTickRate = 4,
+                        OverallDifficulty = 10,
+                    },
+                    Ruleset = new ManiaRuleset().RulesetInfo
+                },
+            };
+
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(beatmap.HitObjects[1].StartTime, ManiaAction.Key1),
+                new ManiaReplayFrame(beatmap.HitObjects[1].GetEndTime()),
+            }, beatmap);
+
+            AddAssert("first hold note missed", () => judgementResults.Where(j => beatmap.HitObjects[0].NestedHitObjects.Contains(j.HitObject))
+                                                                      .All(j => !j.Type.IsHit()));
+
+            AddAssert("second hold note hit", () => judgementResults.Where(j => beatmap.HitObjects[1].NestedHitObjects.Contains(j.HitObject))
+                                                                    .All(j => j.Type.IsHit()));
+        }
+
+        [Test]
+        public void TestZeroLength()
+        {
+            var beatmap = new Beatmap<ManiaHitObject>
+            {
+                HitObjects =
+                {
+                    new HoldNote
+                    {
+                        StartTime = 1000,
+                        Duration = 0,
+                        Column = 0,
+                    },
+                },
+                BeatmapInfo = { Ruleset = new ManiaRuleset().RulesetInfo },
+            };
+
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(beatmap.HitObjects[0].StartTime, ManiaAction.Key1),
+                new ManiaReplayFrame(beatmap.HitObjects[0].GetEndTime() + 1),
+            }, beatmap);
+
+            AddAssert("hold note hit", () => judgementResults.Where(j => beatmap.HitObjects[0].NestedHitObjects.Contains(j.HitObject))
+                                                             .All(j => j.Type.IsHit()));
+        }
+
+        private void assertHitObjectJudgement(HitObject hitObject, HitResult result)
+            => AddAssert($"object judged as {result}", () => judgementResults.First(j => j.HitObject == hitObject).Type, () => Is.EqualTo(result));
+
+        private void assertHeadJudgement(HitResult result)
+            => AddAssert($"head judged as {result}", () => judgementResults.First(j => j.HitObject is Note).Type, () => Is.EqualTo(result));
+
+        private void assertTailJudgement(HitResult result)
+            => AddAssert($"tail judged as {result}", () => judgementResults.Single(j => j.HitObject is TailNote).Type, () => Is.EqualTo(result));
+
+        private void assertNoteJudgement(HitResult result)
+            => AddAssert($"hold note judged as {result}", () => judgementResults.Single(j => j.HitObject is HoldNote).Type, () => Is.EqualTo(result));
+
+        private void assertComboAtJudgement(int judgementIndex, int combo)
+            => AddAssert($"combo at judgement {judgementIndex} is {combo}", () => judgementResults.ElementAt(judgementIndex).ComboAfterJudgement, () => Is.EqualTo(combo));
+
+        private ScoreAccessibleReplayPlayer currentPlayer = null!;
+
+        private void performTest(List<ReplayFrame> frames, Beatmap<ManiaHitObject>? beatmap = null)
+        {
+            if (beatmap == null)
+            {
+                beatmap = new Beatmap<ManiaHitObject>
+                {
+                    HitObjects =
+                    {
+                        new HoldNote
+                        {
+                            StartTime = time_head,
+                            Duration = time_tail - time_head,
+                            Column = 0,
+                        }
+                    },
+                    BeatmapInfo =
+                    {
+                        Difficulty = new BeatmapDifficulty { SliderTickRate = 4 },
+                        Ruleset = new ManiaRuleset().RulesetInfo,
+                    },
+                };
+
+                beatmap.ControlPointInfo.Add(0, new EffectControlPoint { ScrollSpeed = 0.1f });
+            }
+
+            AddStep("load player", () =>
+            {
+                SelectedMods.Value = new List<Mod>
+                {
+                    new ManiaModNoRelease()
+                };
+
+                Beatmap.Value = CreateWorkingBeatmap(beatmap);
+
+                var p = new ScoreAccessibleReplayPlayer(new Score { Replay = new Replay { Frames = frames } });
+
+                p.OnLoadComplete += _ =>
+                {
+                    p.ScoreProcessor.NewJudgement += result =>
+                    {
+                        if (currentPlayer == p) judgementResults.Add(result);
+                    };
+                };
+
+                LoadScreen(currentPlayer = p);
+                judgementResults = new List<JudgementResult>();
+            });
+
+            AddUntilStep("Beatmap at 0", () => Beatmap.Value.Track.CurrentTime == 0);
+            AddUntilStep("Wait until player is loaded", () => currentPlayer.IsCurrentScreen());
+
+            AddUntilStep("Wait for completion", () => currentPlayer.ScoreProcessor.HasCompleted.Value);
+        }
+
+        private partial class ScoreAccessibleReplayPlayer : ReplayPlayer
+        {
+            public new ScoreProcessor ScoreProcessor => base.ScoreProcessor;
+
+            protected override bool PauseOnFocusLost => false;
+
+            public ScoreAccessibleReplayPlayer(Score score)
+                : base(score, new PlayerConfiguration
+                {
+                    AllowPause = false,
+                    ShowResults = false,
+                })
+            {
+            }
+        }
+    }
+}
@@ -66,7 +66,7 @@ namespace osu.Game.Rulesets.Mania.Tests
            AddStep("Hold key", () =>
            {
                clock.CurrentTime = 0;
-                note.OnPressed(new KeyBindingPressEvent<ManiaAction>(GetContainingInputManager().CurrentState, ManiaAction.Key1));
+                note.OnPressed(new KeyBindingPressEvent<ManiaAction>(GetContainingInputManager()!.CurrentState, ManiaAction.Key1));
            });
            AddStep("progress time", () => clock.CurrentTime = 500);
            AddAssert("head is visible", () => note.Head.Alpha == 1);
@@ -474,8 +474,8 @@ namespace osu.Game.Rulesets.Mania.Tests
            AddAssert("first hold note missed", () => judgementResults.Where(j => beatmap.HitObjects[0].NestedHitObjects.Contains(j.HitObject))
                                                                      .All(j => !j.Type.IsHit()));

-            AddAssert("second hold note missed", () => judgementResults.Where(j => beatmap.HitObjects[1].NestedHitObjects.Contains(j.HitObject))
-                                                                       .All(j => j.Type.IsHit()));
+            AddAssert("second hold note hit", () => judgementResults.Where(j => beatmap.HitObjects[1].NestedHitObjects.Contains(j.HitObject))
+                                                                    .All(j => j.Type.IsHit()));
        }

        [Test]
@@ -0,0 +1,49 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Input;
+using osu.Framework.Testing;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    public partial class TestSceneManiaTouchInputArea : PlayerTestScene
+    {
+        protected override Ruleset CreatePlayerRuleset() => new ManiaRuleset();
+
+        [Test]
+        public void TestTouchAreaNotInitiallyVisible()
+        {
+            AddAssert("touch area not visible", () => getTouchOverlay()?.State.Value == Visibility.Hidden);
+        }
+
+        [Test]
+        public void TestPressReceptors()
+        {
+            AddAssert("touch area not visible", () => getTouchOverlay()?.State.Value == Visibility.Hidden);
+
+            for (int i = 0; i < 4; i++)
+            {
+                int index = i;
+
+                AddStep($"touch receptor {index}", () => InputManager.BeginTouch(new Touch(TouchSource.Touch1, getReceptor(index).ScreenSpaceDrawQuad.Centre)));
+
+                AddAssert("action sent",
+                    () => this.ChildrenOfType<ManiaInputManager>().SelectMany(m => m.KeyBindingContainer.PressedActions),
+                    () => Does.Contain(getReceptor(index).Action.Value));
+
+                AddStep($"release receptor {index}", () => InputManager.EndTouch(new Touch(TouchSource.Touch1, getReceptor(index).ScreenSpaceDrawQuad.Centre)));
+
+                AddAssert("touch area visible", () => getTouchOverlay()?.State.Value == Visibility.Visible);
+            }
+        }
+
+        private ManiaTouchInputArea? getTouchOverlay() => this.ChildrenOfType<ManiaTouchInputArea>().SingleOrDefault();
+
+        private ManiaTouchInputArea.ColumnInputReceptor getReceptor(int index) => this.ChildrenOfType<ManiaTouchInputArea.ColumnInputReceptor>().ElementAt(index);
+    }
+}
@@ -8,7 +8,6 @@ using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions.Color4Extensions;
-using osu.Framework.Extensions.EnumExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
@@ -100,7 +99,7 @@ namespace osu.Game.Rulesets.Mania.Tests
        }

        private bool verifyAnchors(DrawableHitObject hitObject, Anchor expectedAnchor)
-            => hitObject.Anchor.HasFlagFast(expectedAnchor) && hitObject.Origin.HasFlagFast(expectedAnchor);
+            => hitObject.Anchor.HasFlag(expectedAnchor) && hitObject.Origin.HasFlag(expectedAnchor);

        private bool verifyAnchors(DrawableHoldNote holdNote, Anchor expectedAnchor)
            => verifyAnchors((DrawableHitObject)holdNote, expectedAnchor) && holdNote.NestedHitObjects.All(n => verifyAnchors(n, expectedAnchor));
@@ -34,16 +34,21 @@ namespace osu.Game.Rulesets.Mania.Tests
        [SetUpSteps]
        public void SetUpSteps()
        {
-            AddStep("setup hierarchy", () => Child = new Container
+            AddStep("setup hierarchy", () =>
            {
-                Clock = new FramedClock(clock = new ManualClock()),
-                RelativeSizeAxes = Axes.Both,
-                Anchor = Anchor.Centre,
-                Origin = Anchor.Centre,
-                Children = new[]
+                Child = new Container
                {
-                    drawableRuleset = (DrawableManiaRuleset)Ruleset.Value.CreateInstance().CreateDrawableRulesetWith(createTestBeatmap())
-                }
+                    Clock = new FramedClock(clock = new ManualClock()),
+                    RelativeSizeAxes = Axes.Both,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Children = new[]
+                    {
+                        drawableRuleset = (DrawableManiaRuleset)Ruleset.Value.CreateInstance().CreateDrawableRulesetWith(createTestBeatmap())
+                    }
+                };
+
+                drawableRuleset.AllowBackwardsSeeks = true;
            });
            AddStep("retrieve config bindable", () =>
            {
@@ -22,11 +22,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
        /// </summary>
        public int TotalColumns => Stages.Sum(g => g.Columns);

-        /// <summary>
-        /// The total number of columns that were present in this <see cref="ManiaBeatmap"/> before any user adjustments.
-        /// </summary>
-        public readonly int OriginalTotalColumns;
-
        /// <summary>
        /// Creates a new <see cref="ManiaBeatmap"/>.
        /// </summary>
@@ -35,7 +30,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
        public ManiaBeatmap(StageDefinition defaultStage, int? originalTotalColumns = null)
        {
            Stages.Add(defaultStage);
-            OriginalTotalColumns = originalTotalColumns ?? defaultStage.Columns;
        }

        public override IEnumerable<BeatmapStatistic> GetStatistics()
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.

-#nullable disable
-
 using osu.Game.Rulesets.Mania.Objects;
 using System;
 using System.Linq;
@@ -14,6 +12,7 @@ using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Mania.Beatmaps.Patterns;
 using osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy;
+using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Scoring.Legacy;
 using osu.Game.Utils;
 using osuTK;
@@ -27,24 +26,42 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
        /// </summary>
        private const int max_notes_for_density = 7;

+        /// <summary>
+        /// The total number of columns.
+        /// </summary>
+        public int TotalColumns => TargetColumns * (Dual ? 2 : 1);
+
+        /// <summary>
+        /// The number of columns per-stage.
+        /// </summary>
        public int TargetColumns;
+
+        /// <summary>
+        /// Whether to double the number of stages.
+        /// </summary>
        public bool Dual;
+
+        /// <summary>
+        /// Whether the beatmap instantiated with is for the mania ruleset.
+        /// </summary>
        public readonly bool IsForCurrentRuleset;

-        private readonly int originalTargetColumns;
-
        // Internal for testing purposes
-        internal LegacyRandom Random { get; private set; }
+        internal readonly LegacyRandom Random;

        private Pattern lastPattern = new Pattern();

-        private ManiaBeatmap beatmap;
-
        public ManiaBeatmapConverter(IBeatmap beatmap, Ruleset ruleset)
-            : base(beatmap, ruleset)
+            : this(beatmap, LegacyBeatmapConversionDifficultyInfo.FromBeatmap(beatmap), ruleset)
        {
-            IsForCurrentRuleset = beatmap.BeatmapInfo.Ruleset.Equals(ruleset.RulesetInfo);
-            TargetColumns = GetColumnCount(LegacyBeatmapConversionDifficultyInfo.FromBeatmap(beatmap));
+        }
+
+        private ManiaBeatmapConverter(IBeatmap? beatmap, LegacyBeatmapConversionDifficultyInfo difficulty, Ruleset ruleset)
+            : base(beatmap!, ruleset)
+        {
+            IsForCurrentRuleset = difficulty.SourceRuleset.Equals(ruleset.RulesetInfo);
+            Random = new LegacyRandom((int)MathF.Round(difficulty.DrainRate + difficulty.CircleSize) * 20 + (int)(difficulty.OverallDifficulty * 41.2) + (int)MathF.Round(difficulty.ApproachRate));
+            TargetColumns = getColumnCount(difficulty);

            if (IsForCurrentRuleset && TargetColumns > ManiaRuleset.MAX_STAGE_KEYS)
            {
@@ -52,52 +69,53 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                Dual = true;
            }

-            originalTargetColumns = TargetColumns;
+            static int getColumnCount(LegacyBeatmapConversionDifficultyInfo difficulty)
+            {
+                double roundedCircleSize = Math.Round(difficulty.CircleSize);
+
+                if (difficulty.SourceRuleset.ShortName == ManiaRuleset.SHORT_NAME)
+                    return (int)Math.Max(1, roundedCircleSize);
+
+                double roundedOverallDifficulty = Math.Round(difficulty.OverallDifficulty);
+
+                if (difficulty.TotalObjectCount > 0 && difficulty.EndTimeObjectCount >= 0)
+                {
+                    int countSliderOrSpinner = difficulty.EndTimeObjectCount;
+
+                    // In osu!stable, this division appears as if it happens on floats, but due to release-mode
+                    // optimisations, it actually ends up happening on doubles.
+                    double percentSpecialObjects = (double)countSliderOrSpinner / difficulty.TotalObjectCount;
+
+                    if (percentSpecialObjects < 0.2)
+                        return 7;
+                    if (percentSpecialObjects < 0.3 || roundedCircleSize >= 5)
+                        return roundedOverallDifficulty > 5 ? 7 : 6;
+                    if (percentSpecialObjects > 0.6)
+                        return roundedOverallDifficulty > 4 ? 5 : 4;
+                }
+
+                return Math.Max(4, Math.Min((int)roundedOverallDifficulty + 1, 7));
+            }
        }

-        public static int GetColumnCount(LegacyBeatmapConversionDifficultyInfo difficulty)
+        public static int GetColumnCount(LegacyBeatmapConversionDifficultyInfo difficulty, IReadOnlyList<Mod>? mods = null)
        {
-            double roundedCircleSize = Math.Round(difficulty.CircleSize);
+            var converter = new ManiaBeatmapConverter(null, difficulty, new ManiaRuleset());

-            if (difficulty.SourceRuleset.ShortName == ManiaRuleset.SHORT_NAME)
-                return (int)Math.Max(1, roundedCircleSize);
-
-            double roundedOverallDifficulty = Math.Round(difficulty.OverallDifficulty);
-
-            if (difficulty.TotalObjectCount > 0 && difficulty.EndTimeObjectCount >= 0)
+            if (mods != null)
            {
-                int countSliderOrSpinner = difficulty.EndTimeObjectCount;
-
-                // In osu!stable, this division appears as if it happens on floats, but due to release-mode
-                // optimisations, it actually ends up happening on doubles.
-                double percentSpecialObjects = (double)countSliderOrSpinner / difficulty.TotalObjectCount;
-
-                if (percentSpecialObjects < 0.2)
-                    return 7;
-                if (percentSpecialObjects < 0.3 || roundedCircleSize >= 5)
-                    return roundedOverallDifficulty > 5 ? 7 : 6;
-                if (percentSpecialObjects > 0.6)
-                    return roundedOverallDifficulty > 4 ? 5 : 4;
+                foreach (var m in mods.OfType<IApplicableToBeatmapConverter>())
+                    m.ApplyToBeatmapConverter(converter);
            }

-            return Math.Max(4, Math.Min((int)roundedOverallDifficulty + 1, 7));
+            return converter.TotalColumns;
        }

        public override bool CanConvert() => Beatmap.HitObjects.All(h => h is IHasXPosition);

-        protected override Beatmap<ManiaHitObject> ConvertBeatmap(IBeatmap original, CancellationToken cancellationToken)
-        {
-            IBeatmapDifficultyInfo difficulty = original.Difficulty;
-
-            int seed = (int)MathF.Round(difficulty.DrainRate + difficulty.CircleSize) * 20 + (int)(difficulty.OverallDifficulty * 41.2) + (int)MathF.Round(difficulty.ApproachRate);
-            Random = new LegacyRandom(seed);
-
-            return base.ConvertBeatmap(original, cancellationToken);
-        }
-
        protected override Beatmap<ManiaHitObject> CreateBeatmap()
        {
-            beatmap = new ManiaBeatmap(new StageDefinition(TargetColumns), originalTargetColumns);
+            ManiaBeatmap beatmap = new ManiaBeatmap(new StageDefinition(TargetColumns));

            if (Dual)
                beatmap.Stages.Add(new StageDefinition(TargetColumns));
@@ -115,10 +133,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
            }

            var objects = IsForCurrentRuleset ? generateSpecific(original, beatmap) : generateConverted(original, beatmap);
-
-            if (objects == null)
-                yield break;
-
            foreach (ManiaHitObject obj in objects)
                yield return obj;
        }
@@ -152,7 +166,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
        /// <returns>The hit objects generated.</returns>
        private IEnumerable<ManiaHitObject> generateSpecific(HitObject original, IBeatmap originalBeatmap)
        {
-            var generator = new SpecificBeatmapPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
+            var generator = new SpecificBeatmapPatternGenerator(Random, original, originalBeatmap, TotalColumns, lastPattern);

            foreach (var newPattern in generator.Generate())
            {
@@ -171,13 +185,13 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
        /// <returns>The hit objects generated.</returns>
        private IEnumerable<ManiaHitObject> generateConverted(HitObject original, IBeatmap originalBeatmap)
        {
-            Patterns.PatternGenerator conversion = null;
+            Patterns.PatternGenerator? conversion = null;

            switch (original)
            {
                case IHasPath:
                {
-                    var generator = new PathObjectPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
+                    var generator = new PathObjectPatternGenerator(Random, original, originalBeatmap, TotalColumns, lastPattern);
                    conversion = generator;

                    var positionData = original as IHasPosition;
@@ -195,7 +209,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps

                case IHasDuration endTimeData:
                {
-                    conversion = new EndTimeObjectPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
+                    conversion = new EndTimeObjectPatternGenerator(Random, original, originalBeatmap, TotalColumns, lastPattern);

                    recordNote(endTimeData.EndTime, new Vector2(256, 192));
                    computeDensity(endTimeData.EndTime);
@@ -206,7 +220,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                {
                    computeDensity(original.StartTime);

-                    conversion = new HitObjectPatternGenerator(Random, original, beatmap, lastPattern, lastTime, lastPosition, density, lastStair, originalBeatmap);
+                    conversion = new HitObjectPatternGenerator(Random, original, originalBeatmap, TotalColumns, lastPattern, lastTime, lastPosition, density, lastStair);

                    recordNote(original.StartTime, positionData.Position);
                    break;
@@ -231,8 +245,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
        /// </summary>
        private class SpecificBeatmapPatternGenerator : Patterns.Legacy.PatternGenerator
        {
-            public SpecificBeatmapPatternGenerator(LegacyRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, IBeatmap originalBeatmap)
-                : base(random, hitObject, beatmap, previousPattern, originalBeatmap)
+            public SpecificBeatmapPatternGenerator(LegacyRandom random, HitObject hitObject, IBeatmap beatmap, int totalColumns, Pattern previousPattern)
+                : base(random, hitObject, beatmap, previousPattern, totalColumns)
            {
            }

@@ -17,8 +17,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
        private readonly int endTime;
        private readonly PatternType convertType;

-        public EndTimeObjectPatternGenerator(LegacyRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, IBeatmap originalBeatmap)
-            : base(random, hitObject, beatmap, previousPattern, originalBeatmap)
+        public EndTimeObjectPatternGenerator(LegacyRandom random, HitObject hitObject, IBeatmap beatmap, int totalColumns, Pattern previousPattern)
+            : base(random, hitObject, beatmap, previousPattern, totalColumns)
        {
            endTime = (int)((HitObject as IHasDuration)?.EndTime ?? 0);

@@ -4,7 +4,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using osu.Framework.Extensions.EnumExtensions;
 using osuTK;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
@@ -23,9 +22,9 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

        private readonly PatternType convertType;

-        public HitObjectPatternGenerator(LegacyRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, double previousTime, Vector2 previousPosition, double density,
-                                         PatternType lastStair, IBeatmap originalBeatmap)
-            : base(random, hitObject, beatmap, previousPattern, originalBeatmap)
+        public HitObjectPatternGenerator(LegacyRandom random, HitObject hitObject, IBeatmap beatmap, int totalColumns, Pattern previousPattern, double previousTime, Vector2 previousPosition,
+                                         double density, PatternType lastStair)
+            : base(random, hitObject, beatmap, previousPattern, totalColumns)
        {
            StairType = lastStair;

@@ -79,7 +78,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
            else
                convertType |= PatternType.LowProbability;

-            if (!convertType.HasFlagFast(PatternType.KeepSingle))
+            if (!convertType.HasFlag(PatternType.KeepSingle))
            {
                if (HitObject.Samples.Any(s => s.Name == HitSampleInfo.HIT_FINISH) && TotalColumns != 8)
                    convertType |= PatternType.Mirror;
@@ -102,7 +101,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

                int lastColumn = PreviousPattern.HitObjects.FirstOrDefault()?.Column ?? 0;

-                if (convertType.HasFlagFast(PatternType.Reverse) && PreviousPattern.HitObjects.Any())
+                if (convertType.HasFlag(PatternType.Reverse) && PreviousPattern.HitObjects.Any())
                {
                    // Generate a new pattern by copying the last hit objects in reverse-column order
                    for (int i = RandomStart; i < TotalColumns; i++)
@@ -114,7 +113,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                    return pattern;
                }

-                if (convertType.HasFlagFast(PatternType.Cycle) && PreviousPattern.HitObjects.Count() == 1
+                if (convertType.HasFlag(PatternType.Cycle) && PreviousPattern.HitObjects.Count() == 1
                                                               // If we convert to 7K + 1, let's not overload the special key
                                                               && (TotalColumns != 8 || lastColumn != 0)
                                                               // Make sure the last column was not the centre column
@@ -127,7 +126,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                    return pattern;
                }

-                if (convertType.HasFlagFast(PatternType.ForceStack) && PreviousPattern.HitObjects.Any())
+                if (convertType.HasFlag(PatternType.ForceStack) && PreviousPattern.HitObjects.Any())
                {
                    // Generate a new pattern by placing on the already filled columns
                    for (int i = RandomStart; i < TotalColumns; i++)
@@ -141,7 +140,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

                if (PreviousPattern.HitObjects.Count() == 1)
                {
-                    if (convertType.HasFlagFast(PatternType.Stair))
+                    if (convertType.HasFlag(PatternType.Stair))
                    {
                        // Generate a new pattern by placing on the next column, cycling back to the start if there is no "next"
                        int targetColumn = lastColumn + 1;
@@ -152,7 +151,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                        return pattern;
                    }

-                    if (convertType.HasFlagFast(PatternType.ReverseStair))
+                    if (convertType.HasFlag(PatternType.ReverseStair))
                    {
                        // Generate a new pattern by placing on the previous column, cycling back to the end if there is no "previous"
                        int targetColumn = lastColumn - 1;
@@ -164,10 +163,10 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                    }
                }

-                if (convertType.HasFlagFast(PatternType.KeepSingle))
+                if (convertType.HasFlag(PatternType.KeepSingle))
                    return generateRandomNotes(1);

-                if (convertType.HasFlagFast(PatternType.Mirror))
+                if (convertType.HasFlag(PatternType.Mirror))
                {
                    if (ConversionDifficulty > 6.5)
                        return generateRandomPatternWithMirrored(0.12, 0.38, 0.12);
@@ -179,7 +178,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

                if (ConversionDifficulty > 6.5)
                {
-                    if (convertType.HasFlagFast(PatternType.LowProbability))
+                    if (convertType.HasFlag(PatternType.LowProbability))
                        return generateRandomPattern(0.78, 0.42, 0, 0);

                    return generateRandomPattern(1, 0.62, 0, 0);
@@ -187,7 +186,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

                if (ConversionDifficulty > 4)
                {
-                    if (convertType.HasFlagFast(PatternType.LowProbability))
+                    if (convertType.HasFlag(PatternType.LowProbability))
                        return generateRandomPattern(0.35, 0.08, 0, 0);

                    return generateRandomPattern(0.52, 0.15, 0, 0);
@@ -195,7 +194,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

                if (ConversionDifficulty > 2)
                {
-                    if (convertType.HasFlagFast(PatternType.LowProbability))
+                    if (convertType.HasFlag(PatternType.LowProbability))
                        return generateRandomPattern(0.18, 0, 0, 0);

                    return generateRandomPattern(0.45, 0, 0, 0);
@@ -208,9 +207,9 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

            foreach (var obj in p.HitObjects)
            {
-                if (convertType.HasFlagFast(PatternType.Stair) && obj.Column == TotalColumns - 1)
+                if (convertType.HasFlag(PatternType.Stair) && obj.Column == TotalColumns - 1)
                    StairType = PatternType.ReverseStair;
-                if (convertType.HasFlagFast(PatternType.ReverseStair) && obj.Column == RandomStart)
+                if (convertType.HasFlag(PatternType.ReverseStair) && obj.Column == RandomStart)
                    StairType = PatternType.Stair;
            }

@@ -230,7 +229,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
        {
            var pattern = new Pattern();

-            bool allowStacking = !convertType.HasFlagFast(PatternType.ForceNotStack);
+            bool allowStacking = !convertType.HasFlag(PatternType.ForceNotStack);

            if (!allowStacking)
                noteCount = Math.Min(noteCount, TotalColumns - RandomStart - PreviousPattern.ColumnWithObjects);
@@ -250,7 +249,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

            int getNextColumn(int last)
            {
-                if (convertType.HasFlagFast(PatternType.Gathered))
+                if (convertType.HasFlag(PatternType.Gathered))
                {
                    last++;
                    if (last == TotalColumns)
@@ -297,7 +296,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
        private Pattern generateRandomPatternWithMirrored(double centreProbability, double p2, double p3)
        {
-            if (convertType.HasFlagFast(PatternType.ForceNotStack))
+            if (convertType.HasFlag(PatternType.ForceNotStack))
                return generateRandomPattern(1 / 2f + p2 / 2, p2, (p2 + p3) / 2, p3);

            var pattern = new Pattern();
@@ -7,7 +7,6 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
-using osu.Framework.Extensions.EnumExtensions;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
@@ -31,8 +30,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

        private PatternType convertType;

-        public PathObjectPatternGenerator(LegacyRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, IBeatmap originalBeatmap)
-            : base(random, hitObject, beatmap, previousPattern, originalBeatmap)
+        public PathObjectPatternGenerator(LegacyRandom random, HitObject hitObject, IBeatmap beatmap, int totalColumns, Pattern previousPattern)
+            : base(random, hitObject, beatmap, previousPattern, totalColumns)
        {
            convertType = PatternType.None;
            if (!Beatmap.ControlPointInfo.EffectPointAt(hitObject.StartTime).KiaiMode)
@@ -139,7 +138,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

            if (ConversionDifficulty > 6.5)
            {
-                if (convertType.HasFlagFast(PatternType.LowProbability))
+                if (convertType.HasFlag(PatternType.LowProbability))
                    return generateNRandomNotes(StartTime, 0.78, 0.3, 0);

                return generateNRandomNotes(StartTime, 0.85, 0.36, 0.03);
@@ -147,7 +146,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

            if (ConversionDifficulty > 4)
            {
-                if (convertType.HasFlagFast(PatternType.LowProbability))
+                if (convertType.HasFlag(PatternType.LowProbability))
                    return generateNRandomNotes(StartTime, 0.43, 0.08, 0);

                return generateNRandomNotes(StartTime, 0.56, 0.18, 0);
@@ -155,13 +154,13 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

            if (ConversionDifficulty > 2.5)
            {
-                if (convertType.HasFlagFast(PatternType.LowProbability))
+                if (convertType.HasFlag(PatternType.LowProbability))
                    return generateNRandomNotes(StartTime, 0.3, 0, 0);

                return generateNRandomNotes(StartTime, 0.37, 0.08, 0);
            }

-            if (convertType.HasFlagFast(PatternType.LowProbability))
+            if (convertType.HasFlag(PatternType.LowProbability))
                return generateNRandomNotes(StartTime, 0.17, 0, 0);

            return generateNRandomNotes(StartTime, 0.27, 0, 0);
@@ -219,7 +218,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
            var pattern = new Pattern();

            int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
-            if (convertType.HasFlagFast(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
+            if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
                nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);

            int lastColumn = nextColumn;
@@ -371,7 +370,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy

            static bool isDoubleSample(HitSampleInfo sample) => sample.Name == HitSampleInfo.HIT_CLAP || sample.Name == HitSampleInfo.HIT_FINISH;

-            bool canGenerateTwoNotes = !convertType.HasFlagFast(PatternType.LowProbability);
+            bool canGenerateTwoNotes = !convertType.HasFlag(PatternType.LowProbability);
            canGenerateTwoNotes &= HitObject.Samples.Any(isDoubleSample) || sampleInfoListAt(StartTime).Any(isDoubleSample);

            if (canGenerateTwoNotes)
@@ -404,7 +403,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
            int endTime = startTime + SegmentDuration * SpanCount;

            int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
-            if (convertType.HasFlagFast(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
+            if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
                nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);

            for (int i = 0; i < columnRepeat; i++)
@@ -433,7 +432,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
            var pattern = new Pattern();

            int holdColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
-            if (convertType.HasFlagFast(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
+            if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
                holdColumn = FindAvailableColumn(holdColumn, PreviousPattern);

            // Create the hold note
@@ -27,20 +27,12 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
        /// </summary>
        protected readonly LegacyRandom Random;

-        /// <summary>
-        /// The beatmap which <see cref="HitObject"/> is being converted from.
-        /// </summary>
-        protected readonly IBeatmap OriginalBeatmap;
-
-        protected PatternGenerator(LegacyRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, IBeatmap originalBeatmap)
-            : base(hitObject, beatmap, previousPattern)
+        protected PatternGenerator(LegacyRandom random, HitObject hitObject, IBeatmap beatmap, Pattern previousPattern, int totalColumns)
+            : base(hitObject, beatmap, totalColumns, previousPattern)
        {
            ArgumentNullException.ThrowIfNull(random);
-            ArgumentNullException.ThrowIfNull(originalBeatmap);

            Random = random;
-            OriginalBeatmap = originalBeatmap;
-
            RandomStart = TotalColumns == 8 ? 1 : 0;
        }

@@ -104,17 +96,17 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                if (conversionDifficulty != null)
                    return conversionDifficulty.Value;

-                HitObject lastObject = OriginalBeatmap.HitObjects.LastOrDefault();
-                HitObject firstObject = OriginalBeatmap.HitObjects.FirstOrDefault();
+                HitObject lastObject = Beatmap.HitObjects.LastOrDefault();
+                HitObject firstObject = Beatmap.HitObjects.FirstOrDefault();

                // Drain time in seconds
-                int drainTime = (int)(((lastObject?.StartTime ?? 0) - (firstObject?.StartTime ?? 0) - OriginalBeatmap.TotalBreakTime) / 1000);
+                int drainTime = (int)(((lastObject?.StartTime ?? 0) - (firstObject?.StartTime ?? 0) - Beatmap.TotalBreakTime) / 1000);

                if (drainTime == 0)
                    drainTime = 10000;

-                IBeatmapDifficultyInfo difficulty = OriginalBeatmap.Difficulty;
-                conversionDifficulty = ((difficulty.DrainRate + Math.Clamp(difficulty.ApproachRate, 4, 7)) / 1.5 + (double)OriginalBeatmap.HitObjects.Count / drainTime * 9f) / 38f * 5f / 1.15;
+                IBeatmapDifficultyInfo difficulty = Beatmap.Difficulty;
+                conversionDifficulty = ((difficulty.DrainRate + Math.Clamp(difficulty.ApproachRate, 4, 7)) / 1.5 + (double)Beatmap.HitObjects.Count / drainTime * 9f) / 38f * 5f / 1.15;
                conversionDifficulty = Math.Min(conversionDifficulty.Value, 12);

                return conversionDifficulty.Value;
@@ -3,6 +3,7 @@

 using System;
 using System.Collections.Generic;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects;

 namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
@@ -25,11 +26,11 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
        /// <summary>
        /// The beatmap which <see cref="HitObject"/> is a part of.
        /// </summary>
-        protected readonly ManiaBeatmap Beatmap;
+        protected readonly IBeatmap Beatmap;

        protected readonly int TotalColumns;

-        protected PatternGenerator(HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern)
+        protected PatternGenerator(HitObject hitObject, IBeatmap beatmap, int totalColumns, Pattern previousPattern)
        {
            ArgumentNullException.ThrowIfNull(hitObject);
            ArgumentNullException.ThrowIfNull(beatmap);
@@ -38,8 +39,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
            HitObject = hitObject;
            Beatmap = beatmap;
            PreviousPattern = previousPattern;
-
-            TotalColumns = Beatmap.TotalColumns;
+            TotalColumns = totalColumns;
        }

        /// <summary>
@@ -51,13 +51,8 @@ namespace osu.Game.Rulesets.Mania.Difficulty
                return multiplier;

            // Apply key mod multipliers.
-
            int originalColumns = ManiaBeatmapConverter.GetColumnCount(difficulty);
-            int actualColumns = originalColumns;
-
-            actualColumns = mods.OfType<ManiaKeyMod>().SingleOrDefault()?.KeyCount ?? actualColumns;
-            if (mods.Any(m => m is ManiaModDualStages))
-                actualColumns *= 2;
+            int actualColumns = ManiaBeatmapConverter.GetColumnCount(difficulty, mods);

            if (actualColumns > originalColumns)
                multiplier *= 0.9;
@@ -0,0 +1,81 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using osu.Framework.Allocation;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Mania.Skinning.Default;
+using osuTK;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints.Components
+{
+    public partial class EditHoldNoteEndPiece : CompositeDrawable
+    {
+        public Action? DragStarted { get; init; }
+        public Action<Vector2>? Dragging { get; init; }
+        public Action? DragEnded { get; init; }
+
+        [Resolved]
+        private OsuColour colours { get; set; } = null!;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Height = DefaultNotePiece.NOTE_HEIGHT;
+
+            CornerRadius = 5;
+            Masking = true;
+
+            InternalChild = new DefaultNotePiece();
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            updateState();
+        }
+
+        protected override bool OnHover(HoverEvent e)
+        {
+            updateState();
+            return true;
+        }
+
+        protected override void OnHoverLost(HoverLostEvent e)
+        {
+            updateState();
+            base.OnHoverLost(e);
+        }
+
+        protected override bool OnDragStart(DragStartEvent e)
+        {
+            DragStarted?.Invoke();
+            return true;
+        }
+
+        protected override void OnDrag(DragEvent e)
+        {
+            base.OnDrag(e);
+            Dragging?.Invoke(e.ScreenSpaceMousePosition);
+        }
+
+        protected override void OnDragEnd(DragEndEvent e)
+        {
+            base.OnDragEnd(e);
+            DragEnded?.Invoke();
+        }
+
+        private void updateState()
+        {
+            var colour = colours.Yellow;
+
+            if (IsHovered)
+                colour = colour.Lighten(1);
+
+            Colour = colour;
+        }
+    }
+}
@@ -1,16 +1,16 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.

-#nullable disable
-
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Primitives;
 using osu.Framework.Graphics.Shapes;
 using osu.Game.Graphics;
+using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Edit.Blueprints.Components;
 using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Screens.Edit;
 using osuTK;

 namespace osu.Game.Rulesets.Mania.Edit.Blueprints
@@ -18,10 +18,19 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
    public partial class HoldNoteSelectionBlueprint : ManiaSelectionBlueprint<HoldNote>
    {
        [Resolved]
-        private OsuColour colours { get; set; }
+        private OsuColour colours { get; set; } = null!;

-        private EditNotePiece head;
-        private EditNotePiece tail;
+        [Resolved]
+        private IEditorChangeHandler? changeHandler { get; set; }
+
+        [Resolved]
+        private EditorBeatmap? editorBeatmap { get; set; }
+
+        [Resolved]
+        private IPositionSnapProvider? positionSnapProvider { get; set; }
+
+        private EditHoldNoteEndPiece head = null!;
+        private EditHoldNoteEndPiece tail = null!;

        public HoldNoteSelectionBlueprint(HoldNote hold)
            : base(hold)
@@ -33,8 +42,43 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
        {
            InternalChildren = new Drawable[]
            {
-                head = new EditNotePiece { RelativeSizeAxes = Axes.X },
-                tail = new EditNotePiece { RelativeSizeAxes = Axes.X },
+                head = new EditHoldNoteEndPiece
+                {
+                    RelativeSizeAxes = Axes.X,
+                    DragStarted = () => changeHandler?.BeginChange(),
+                    Dragging = pos =>
+                    {
+                        double endTimeBeforeDrag = HitObject.EndTime;
+                        double proposedStartTime = positionSnapProvider?.FindSnappedPositionAndTime(pos).Time ?? HitObjectContainer.TimeAtScreenSpacePosition(pos);
+                        double proposedEndTime = endTimeBeforeDrag;
+
+                        if (proposedStartTime >= proposedEndTime)
+                            return;
+
+                        HitObject.StartTime = proposedStartTime;
+                        HitObject.EndTime = proposedEndTime;
+                        editorBeatmap?.Update(HitObject);
+                    },
+                    DragEnded = () => changeHandler?.EndChange(),
+                },
+                tail = new EditHoldNoteEndPiece
+                {
+                    RelativeSizeAxes = Axes.X,
+                    DragStarted = () => changeHandler?.BeginChange(),
+                    Dragging = pos =>
+                    {
+                        double proposedStartTime = HitObject.StartTime;
+                        double proposedEndTime = positionSnapProvider?.FindSnappedPositionAndTime(pos).Time ?? HitObjectContainer.TimeAtScreenSpacePosition(pos);
+
+                        if (proposedStartTime >= proposedEndTime)
+                            return;
+
+                        HitObject.StartTime = proposedStartTime;
+                        HitObject.EndTime = proposedEndTime;
+                        editorBeatmap?.Update(HitObject);
+                    },
+                    DragEnded = () => changeHandler?.EndChange(),
+                },
                new Container
                {
                    RelativeSizeAxes = Axes.Both,
@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.

 using osu.Framework.Allocation;
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Objects;
@@ -17,9 +18,6 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
        [Resolved]
        private Playfield playfield { get; set; } = null!;

-        [Resolved]
-        private IScrollingInfo scrollingInfo { get; set; } = null!;
-
        protected ScrollingHitObjectContainer HitObjectContainer => ((ManiaPlayfield)playfield).GetColumn(HitObject.Column).HitObjectContainer;

        protected ManiaSelectionBlueprint(T hitObject)
@@ -28,14 +26,31 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
            RelativeSizeAxes = Axes.None;
        }

-        protected override void Update()
-        {
-            base.Update();
+        private readonly IBindable<ScrollingDirection> directionBindable = new Bindable<ScrollingDirection>();

-            var anchor = scrollingInfo.Direction.Value == ScrollingDirection.Up ? Anchor.TopCentre : Anchor.BottomCentre;
+        [BackgroundDependencyLoader]
+        private void load(IScrollingInfo scrollingInfo)
+        {
+            directionBindable.BindTo(scrollingInfo.Direction);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            directionBindable.BindValueChanged(onDirectionChanged, true);
+        }
+
+        private void onDirectionChanged(ValueChangedEvent<ScrollingDirection> direction)
+        {
+            var anchor = direction.NewValue == ScrollingDirection.Up ? Anchor.TopCentre : Anchor.BottomCentre;
            Anchor = Origin = anchor;
            foreach (var child in InternalChildren)
                child.Anchor = child.Origin = anchor;
+        }
+
+        protected override void Update()
+        {
+            base.Update();

            Position = Parent!.ToLocalSpace(HitObjectContainer.ScreenSpacePositionAtTime(HitObject.StartTime)) - AnchorPosition;
            Width = HitObjectContainer.DrawWidth;
@@ -0,0 +1,39 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks.Components;
+
+namespace osu.Game.Rulesets.Mania.Edit.Checks
+{
+    public class CheckKeyCount : ICheck
+    {
+        public CheckMetadata Metadata => new CheckMetadata(CheckCategory.Settings, "Check mania keycount.");
+
+        public IEnumerable<IssueTemplate> PossibleTemplates => new IssueTemplate[]
+        {
+            new IssueTemplateKeycountTooLow(this),
+        };
+
+        public IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            var diff = context.Beatmap.Difficulty;
+
+            if (diff.CircleSize < 4)
+            {
+                yield return new IssueTemplateKeycountTooLow(this).Create(diff.CircleSize);
+            }
+        }
+
+        public class IssueTemplateKeycountTooLow : IssueTemplate
+        {
+            public IssueTemplateKeycountTooLow(ICheck check)
+                : base(check, IssueType.Problem, "Key count is {0} and must be 4 or higher.")
+            {
+            }
+
+            public Issue Create(float current) => new Issue(this, current);
+        }
+    }
+}
@@ -0,0 +1,33 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks;
+using osu.Game.Rulesets.Edit.Checks.Components;
+
+namespace osu.Game.Rulesets.Mania.Edit.Checks
+{
+    public class CheckManiaAbnormalDifficultySettings : CheckAbnormalDifficultySettings
+    {
+        public override CheckMetadata Metadata => new CheckMetadata(CheckCategory.Settings, "Checks mania relevant settings");
+
+        public override IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            var diff = context.Beatmap.Difficulty;
+            Issue? issue;
+
+            if (HasMoreThanOneDecimalPlace("Overall difficulty", diff.OverallDifficulty, out issue))
+                yield return issue;
+
+            if (OutOfRange("Overall difficulty", diff.OverallDifficulty, out issue))
+                yield return issue;
+
+            if (HasMoreThanOneDecimalPlace("Drain rate", diff.DrainRate, out issue))
+                yield return issue;
+
+            if (OutOfRange("Drain rate", diff.DrainRate, out issue))
+                yield return issue;
+        }
+    }
+}
--- a/Show More
+++ b/Show More
				`@@ -0,0 +1 @@`
				`{"Mappings":[{"StartTime":265568.0,"Objects":[{"StartTime":265568.0,"Position":486.0,"HyperDash":false},{"StartTime":265658.0,"Position":465.1873,"HyperDash":false},{"StartTime":265749.0,"Position":463.208435,"HyperDash":false},{"StartTime":265840.0,"Position":465.146484,"HyperDash":false},{"StartTime":265967.0,"Position":459.5862,"HyperDash":false}]}]}`