Merge branch 'master' into tourney-asset-refactor

.idea/.idea.osu.Desktop/.idea/modules.xml

@@ -2,7 +2,7 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/.idea.osu.Desktop/riderModule.iml" filepath="$PROJECT_DIR$/.idea/.idea.osu.Desktop/riderModule.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/.idea.osu.Desktop/.idea/riderModule.iml" filepath="$PROJECT_DIR$/.idea/.idea.osu.Desktop/.idea/riderModule.iml" />
     </modules>
   </component>
 </project>

osu.Android.props

@@ -51,7 +51,7 @@
     <Reference Include="Java.Interop" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2020.904.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2020.1004.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2020.1016.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2020.1009.0" />
   </ItemGroup>
 </Project>

osu.Desktop/Updater/SquirrelUpdateManager.cs

@@ -29,6 +29,11 @@ namespace osu.Desktop.Updater
 
         private static readonly Logger logger = Logger.GetLogger("updater");
 
+        /// <summary>
+        /// Whether an update has been downloaded but not yet applied.
+        /// </summary>
+        private bool updatePending;
+
         [BackgroundDependencyLoader]
         private void load(NotificationOverlay notification)
         {
@@ -37,9 +42,9 @@ namespace osu.Desktop.Updater
             Splat.Locator.CurrentMutable.Register(() => new SquirrelLogger(), typeof(Splat.ILogger));
         }
 
-        protected override async Task PerformUpdateCheck() => await checkForUpdateAsync();
+        protected override async Task<bool> PerformUpdateCheck() => await checkForUpdateAsync();
 
-        private async Task checkForUpdateAsync(bool useDeltaPatching = true, UpdateProgressNotification notification = null)
+        private async Task<bool> checkForUpdateAsync(bool useDeltaPatching = true, UpdateProgressNotification notification = null)
         {
             // should we schedule a retry on completion of this check?
             bool scheduleRecheck = true;
@@ -49,9 +54,19 @@ namespace osu.Desktop.Updater
                 updateManager ??= await UpdateManager.GitHubUpdateManager(@"https://github.com/ppy/osu", @"osulazer", null, null, true);
 
                 var info = await updateManager.CheckForUpdate(!useDeltaPatching);
+
                 if (info.ReleasesToApply.Count == 0)
+                {
+                    if (updatePending)
+                    {
+                        // the user may have dismissed the completion notice, so show it again.
+                        notificationOverlay.Post(new UpdateCompleteNotification(this));
+                        return true;
+                    }
+
                     // no updates available. bail and retry later.
-                    return;
+                    return false;
+                }
 
                 if (notification == null)
                 {
@@ -72,6 +87,7 @@ namespace osu.Desktop.Updater
                     await updateManager.ApplyReleases(info, p => notification.Progress = p / 100f);
 
                     notification.State = ProgressNotificationState.Completed;
+                    updatePending = true;
                 }
                 catch (Exception e)
                 {
@@ -103,6 +119,8 @@ namespace osu.Desktop.Updater
                     Scheduler.AddDelayed(async () => await checkForUpdateAsync(), 60000 * 30);
                 }
             }
+
+            return true;
         }
 
         protected override void Dispose(bool isDisposing)
@@ -111,10 +129,27 @@ namespace osu.Desktop.Updater
             updateManager?.Dispose();
         }
 
+        private class UpdateCompleteNotification : ProgressCompletionNotification
+        {
+            [Resolved]
+            private OsuGame game { get; set; }
+
+            public UpdateCompleteNotification(SquirrelUpdateManager updateManager)
+            {
+                Text = @"Update ready to install. Click to restart!";
+
+                Activated = () =>
+                {
+                    updateManager.PrepareUpdateAsync()
+                                 .ContinueWith(_ => updateManager.Schedule(() => game.GracefullyExit()));
+                    return true;
+                };
+            }
+        }
+
         private class UpdateProgressNotification : ProgressNotification
         {
             private readonly SquirrelUpdateManager updateManager;
-            private OsuGame game;
 
             public UpdateProgressNotification(SquirrelUpdateManager updateManager)
             {
@@ -123,23 +158,12 @@ namespace osu.Desktop.Updater
 
             protected override Notification CreateCompletionNotification()
             {
-                return new ProgressCompletionNotification
-                {
-                    Text = @"Update ready to install. Click to restart!",
-                    Activated = () =>
-                    {
-                        updateManager.PrepareUpdateAsync()
-                                     .ContinueWith(_ => updateManager.Schedule(() => game.GracefullyExit()));
-                        return true;
-                    }
-                };
+                return new UpdateCompleteNotification(updateManager);
             }
 
             [BackgroundDependencyLoader]
-            private void load(OsuColour colours, OsuGame game)
+            private void load(OsuColour colours)
             {
-                this.game = game;
-
                 IconContent.AddRange(new Drawable[]
                 {
                     new Box

osu.Desktop/Windows/GameplayWinKeyBlocker.cs

@@ -5,24 +5,24 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Platform;
+using osu.Game;
 using osu.Game.Configuration;
 
 namespace osu.Desktop.Windows
 {
     public class GameplayWinKeyBlocker : Component
     {
-        private Bindable<bool> allowScreenSuspension;
         private Bindable<bool> disableWinKey;
+        private Bindable<bool> localUserPlaying;
 
-        private GameHost host;
+        [Resolved]
+        private GameHost host { get; set; }
 
         [BackgroundDependencyLoader]
-        private void load(GameHost host, OsuConfigManager config)
+        private void load(OsuGame game, OsuConfigManager config)
         {
-            this.host = host;
-
-            allowScreenSuspension = host.AllowScreenSuspension.GetBoundCopy();
-            allowScreenSuspension.BindValueChanged(_ => updateBlocking());
+            localUserPlaying = game.LocalUserPlaying.GetBoundCopy();
+            localUserPlaying.BindValueChanged(_ => updateBlocking());
 
             disableWinKey = config.GetBindable<bool>(OsuSetting.GameplayDisableWinKey);
             disableWinKey.BindValueChanged(_ => updateBlocking(), true);
@@ -30,7 +30,7 @@ namespace osu.Desktop.Windows
 
         private void updateBlocking()
         {
-            bool shouldDisable = disableWinKey.Value && !allowScreenSuspension.Value;
+            bool shouldDisable = disableWinKey.Value && localUserPlaying.Value;
 
             if (shouldDisable)
                 host.InputThread.Scheduler.Add(WindowsKey.Disable);

osu.Game.Rulesets.Catch/CatchRuleset.cs

@@ -141,6 +141,35 @@ namespace osu.Game.Rulesets.Catch
 
         public override Drawable CreateIcon() => new SpriteIcon { Icon = OsuIcon.RulesetCatch };
 
+        protected override IEnumerable<HitResult> GetValidHitResults()
+        {
+            return new[]
+            {
+                HitResult.Great,
+
+                HitResult.LargeTickHit,
+                HitResult.SmallTickHit,
+                HitResult.LargeBonus,
+            };
+        }
+
+        public override string GetDisplayNameForHitResult(HitResult result)
+        {
+            switch (result)
+            {
+                case HitResult.LargeTickHit:
+                    return "large droplet";
+
+                case HitResult.SmallTickHit:
+                    return "small droplet";
+
+                case HitResult.LargeBonus:
+                    return "banana";
+            }
+
+            return base.GetDisplayNameForHitResult(result);
+        }
+
         public override DifficultyCalculator CreateDifficultyCalculator(WorkingBeatmap beatmap) => new CatchDifficultyCalculator(this, beatmap);
 
         public override ISkin CreateLegacySkinProvider(ISkinSource source, IBeatmap beatmap) => new CatchLegacySkinTransformer(source);

osu.Game.Rulesets.Catch/Objects/JuiceStream.cs

@@ -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 System.Threading;
@@ -56,6 +57,7 @@ namespace osu.Game.Rulesets.Catch.Objects
                 Volume = s.Volume
             }).ToList();
 
+            int nodeIndex = 0;
             SliderEventDescriptor? lastEvent = null;
 
             foreach (var e in SliderEventGenerator.Generate(StartTime, SpanDuration, Velocity, TickDistance, Path.Distance, this.SpanCount(), LegacyLastTickOffset, cancellationToken))
@@ -105,7 +107,7 @@ namespace osu.Game.Rulesets.Catch.Objects
                     case SliderEventType.Repeat:
                         AddNested(new Fruit
                         {
-                            Samples = Samples,
+                            Samples = this.GetNodeSamples(nodeIndex++),
                             StartTime = e.Time,
                             X = X + Path.PositionAt(e.PathProgress).X,
                         });
@@ -119,7 +121,7 @@ namespace osu.Game.Rulesets.Catch.Objects
         public double Duration
         {
             get => this.SpanCount() * Path.Distance / Velocity;
-            set => throw new System.NotSupportedException($"Adjust via {nameof(RepeatCount)} instead"); // can be implemented if/when needed.
+            set => throw new NotSupportedException($"Adjust via {nameof(RepeatCount)} instead"); // can be implemented if/when needed.
         }
 
         public double EndTime => StartTime + Duration;

osu.Game.Rulesets.Catch/Skinning/CatchLegacySkinTransformer.cs

@@ -13,6 +13,11 @@ namespace osu.Game.Rulesets.Catch.Skinning
 {
     public class CatchLegacySkinTransformer : LegacySkinTransformer
     {
+        /// <summary>
+        /// For simplicity, let's use legacy combo font texture existence as a way to identify legacy skins from default.
+        /// </summary>
+        private bool providesComboCounter => this.HasFont(GetConfig<LegacySetting, string>(LegacySetting.ComboPrefix)?.Value ?? "score");
+
         public CatchLegacySkinTransformer(ISkinSource source)
             : base(source)
         {
@@ -20,6 +25,16 @@ namespace osu.Game.Rulesets.Catch.Skinning
 
         public override Drawable GetDrawableComponent(ISkinComponent component)
         {
+            if (component is HUDSkinComponent hudComponent)
+            {
+                switch (hudComponent.Component)
+                {
+                    case HUDSkinComponents.ComboCounter:
+                        // catch may provide its own combo counter; hide the default.
+                        return providesComboCounter ? Drawable.Empty() : null;
+                }
+            }
+
             if (!(component is CatchSkinComponent catchSkinComponent))
                 return null;
 
@@ -55,11 +70,9 @@ namespace osu.Game.Rulesets.Catch.Skinning
                            this.GetAnimation("fruit-ryuuta", true, true, true);
 
                 case CatchSkinComponents.CatchComboCounter:
-                    var comboFont = GetConfig<LegacySetting, string>(LegacySetting.ComboPrefix)?.Value ?? "score";
 
-                    // For simplicity, let's use legacy combo font texture existence as a way to identify legacy skins from default.
-                    if (this.HasFont(comboFont))
-                        return new LegacyComboCounter(Source);
+                    if (providesComboCounter)
+                        return new LegacyCatchComboCounter(Source);
 
                     break;
             }

osu.Game.Rulesets.Catch/Skinning/LegacyCatchComboCounter.cs

@@ -14,13 +14,13 @@ namespace osu.Game.Rulesets.Catch.Skinning
     /// <summary>
     /// A combo counter implementation that visually behaves almost similar to stable's osu!catch combo counter.
     /// </summary>
-    public class LegacyComboCounter : CompositeDrawable, ICatchComboCounter
+    public class LegacyCatchComboCounter : CompositeDrawable, ICatchComboCounter
     {
         private readonly LegacyRollingCounter counter;
 
         private readonly LegacyRollingCounter explosion;
 
-        public LegacyComboCounter(ISkin skin)
+        public LegacyCatchComboCounter(ISkin skin)
         {
             var fontName = skin.GetConfig<LegacySetting, string>(LegacySetting.ComboPrefix)?.Value ?? "score";
             var fontOverlap = skin.GetConfig<LegacySetting, float>(LegacySetting.ComboOverlap)?.Value ?? -2f;

osu.Game.Rulesets.Mania.Tests/ManiaBeatmapConversionTest.cs

@@ -83,11 +83,17 @@ namespace osu.Game.Rulesets.Mania.Tests
             RandomZ = snapshot.RandomZ;
         }
 
+        public override void PostProcess()
+        {
+            base.PostProcess();
+            Objects.Sort();
+        }
+
         public bool Equals(ManiaConvertMapping other) => other != null && RandomW == other.RandomW && RandomX == other.RandomX && RandomY == other.RandomY && RandomZ == other.RandomZ;
         public override bool Equals(ConvertMapping<ConvertValue> other) => base.Equals(other) && Equals(other as ManiaConvertMapping);
     }
 
-    public struct ConvertValue : IEquatable<ConvertValue>
+    public struct ConvertValue : IEquatable<ConvertValue>, IComparable<ConvertValue>
     {
         /// <summary>
         /// A sane value to account for osu!stable using ints everwhere.
@@ -102,5 +108,15 @@ namespace osu.Game.Rulesets.Mania.Tests
             => Precision.AlmostEquals(StartTime, other.StartTime, conversion_lenience)
                && Precision.AlmostEquals(EndTime, other.EndTime, conversion_lenience)
                && Column == other.Column;
+
+        public int CompareTo(ConvertValue other)
+        {
+            var result = StartTime.CompareTo(other.StartTime);
+
+            if (result != 0)
+                return result;
+
+            return Column.CompareTo(other.Column);
+        }
     }
 }

osu.Game.Rulesets.Mania.Tests/ManiaDifficultyCalculatorTest.cs

@@ -13,7 +13,7 @@ namespace osu.Game.Rulesets.Mania.Tests
     {
         protected override string ResourceAssembly => "osu.Game.Rulesets.Mania";
 
-        [TestCase(2.3683365342338796d, "diffcalc-test")]
+        [TestCase(2.3449735700206298d, "diffcalc-test")]
         public void Test(double expected, string name)
             => base.Test(expected, name);
 

osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmap.cs

@@ -21,13 +21,20 @@ 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>
         /// <param name="defaultStage">The initial stages.</param>
-        public ManiaBeatmap(StageDefinition defaultStage)
+        /// <param name="originalTotalColumns">The total number of columns present before any user adjustments. Defaults to the total columns in <paramref name="defaultStage"/>.</param>
+        public ManiaBeatmap(StageDefinition defaultStage, int? originalTotalColumns = null)
         {
             Stages.Add(defaultStage);
+            OriginalTotalColumns = originalTotalColumns ?? defaultStage.Columns;
         }
 
         public override IEnumerable<BeatmapStatistic> GetStatistics()

osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs

@@ -28,6 +28,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
         public bool Dual;
         public readonly bool IsForCurrentRuleset;
 
+        private readonly int originalTargetColumns;
+
         // Internal for testing purposes
         internal FastRandom Random { get; private set; }
 
@@ -65,6 +67,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                 else
                     TargetColumns = Math.Max(4, Math.Min((int)roundedOverallDifficulty + 1, 7));
             }
+
+            originalTargetColumns = TargetColumns;
         }
 
         public override bool CanConvert() => Beatmap.HitObjects.All(h => h is IHasXPosition);
@@ -81,7 +85,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
 
         protected override Beatmap<ManiaHitObject> CreateBeatmap()
         {
-            beatmap = new ManiaBeatmap(new StageDefinition { Columns = TargetColumns });
+            beatmap = new ManiaBeatmap(new StageDefinition { Columns = TargetColumns }, originalTargetColumns);
 
             if (Dual)
                 beatmap.Stages.Add(new StageDefinition { Columns = TargetColumns });
@@ -116,7 +120,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                 prevNoteTimes.RemoveAt(0);
             prevNoteTimes.Add(newNoteTime);
 
-            density = (prevNoteTimes[^1] - prevNoteTimes[0]) / prevNoteTimes.Count;
+            if (prevNoteTimes.Count >= 2)
+                density = (prevNoteTimes[^1] - prevNoteTimes[0]) / prevNoteTimes.Count;
         }
 
         private double lastTime;
@@ -180,7 +185,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
 
                 case IHasDuration endTimeData:
                 {
-                    conversion = new EndTimeObjectPatternGenerator(Random, original, beatmap, originalBeatmap);
+                    conversion = new EndTimeObjectPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
 
                     recordNote(endTimeData.EndTime, new Vector2(256, 192));
                     computeDensity(endTimeData.EndTime);

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs

@@ -3,8 +3,8 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
-using osu.Framework.Utils;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.MathUtils;
@@ -12,6 +12,7 @@ using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Beatmaps.Formats;
 
 namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 {
@@ -25,8 +26,9 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         private const float osu_base_scoring_distance = 100;
 
-        public readonly double EndTime;
-        public readonly double SegmentDuration;
+        public readonly int StartTime;
+        public readonly int EndTime;
+        public readonly int SegmentDuration;
         public readonly int SpanCount;
 
         private PatternType convertType;
@@ -41,20 +43,26 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             var distanceData = hitObject as IHasDistance;
             var repeatsData = hitObject as IHasRepeats;
 
-            SpanCount = repeatsData?.SpanCount() ?? 1;
+            Debug.Assert(distanceData != null);
 
             TimingControlPoint timingPoint = beatmap.ControlPointInfo.TimingPointAt(hitObject.StartTime);
             DifficultyControlPoint difficultyPoint = beatmap.ControlPointInfo.DifficultyPointAt(hitObject.StartTime);
 
-            // The true distance, accounting for any repeats
-            double distance = (distanceData?.Distance ?? 0) * SpanCount;
-            // The velocity of the osu! hit object - calculated as the velocity of a slider
-            double osuVelocity = osu_base_scoring_distance * beatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier / timingPoint.BeatLength;
-            // The duration of the osu! hit object
-            double osuDuration = distance / osuVelocity;
+            double beatLength;
+#pragma warning disable 618
+            if (difficultyPoint is LegacyBeatmapDecoder.LegacyDifficultyControlPoint legacyDifficultyPoint)
+#pragma warning restore 618
+                beatLength = timingPoint.BeatLength * legacyDifficultyPoint.BpmMultiplier;
+            else
+                beatLength = timingPoint.BeatLength / difficultyPoint.SpeedMultiplier;
 
-            EndTime = hitObject.StartTime + osuDuration;
-            SegmentDuration = (EndTime - HitObject.StartTime) / SpanCount;
+            SpanCount = repeatsData?.SpanCount() ?? 1;
+            StartTime = (int)Math.Round(hitObject.StartTime);
+
+            // This matches stable's calculation.
+            EndTime = (int)Math.Floor(StartTime + distanceData.Distance * beatLength * SpanCount * 0.01 / beatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier);
+
+            SegmentDuration = (EndTime - StartTime) / SpanCount;
         }
 
         public override IEnumerable<Pattern> Generate()
@@ -76,7 +84,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             foreach (var obj in originalPattern.HitObjects)
             {
-                if (!Precision.AlmostEquals(EndTime, obj.GetEndTime()))
+                if (EndTime != (int)Math.Round(obj.GetEndTime()))
                     intermediatePattern.Add(obj);
                 else
                     endTimePattern.Add(obj);
@@ -91,35 +99,35 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             if (TotalColumns == 1)
             {
                 var pattern = new Pattern();
-                addToPattern(pattern, 0, HitObject.StartTime, EndTime);
+                addToPattern(pattern, 0, StartTime, EndTime);
                 return pattern;
             }
 
             if (SpanCount > 1)
             {
                 if (SegmentDuration <= 90)
-                    return generateRandomHoldNotes(HitObject.StartTime, 1);
+                    return generateRandomHoldNotes(StartTime, 1);
 
                 if (SegmentDuration <= 120)
                 {
                     convertType |= PatternType.ForceNotStack;
-                    return generateRandomNotes(HitObject.StartTime, SpanCount + 1);
+                    return generateRandomNotes(StartTime, SpanCount + 1);
                 }
 
                 if (SegmentDuration <= 160)
-                    return generateStair(HitObject.StartTime);
+                    return generateStair(StartTime);
 
                 if (SegmentDuration <= 200 && ConversionDifficulty > 3)
-                    return generateRandomMultipleNotes(HitObject.StartTime);
+                    return generateRandomMultipleNotes(StartTime);
 
-                double duration = EndTime - HitObject.StartTime;
+                double duration = EndTime - StartTime;
                 if (duration >= 4000)
-                    return generateNRandomNotes(HitObject.StartTime, 0.23, 0, 0);
+                    return generateNRandomNotes(StartTime, 0.23, 0, 0);
 
                 if (SegmentDuration > 400 && SpanCount < TotalColumns - 1 - RandomStart)
-                    return generateTiledHoldNotes(HitObject.StartTime);
+                    return generateTiledHoldNotes(StartTime);
 
-                return generateHoldAndNormalNotes(HitObject.StartTime);
+                return generateHoldAndNormalNotes(StartTime);
             }
 
             if (SegmentDuration <= 110)
@@ -128,37 +136,37 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                     convertType |= PatternType.ForceNotStack;
                 else
                     convertType &= ~PatternType.ForceNotStack;
-                return generateRandomNotes(HitObject.StartTime, SegmentDuration < 80 ? 1 : 2);
+                return generateRandomNotes(StartTime, SegmentDuration < 80 ? 1 : 2);
             }
 
             if (ConversionDifficulty > 6.5)
             {
                 if (convertType.HasFlag(PatternType.LowProbability))
-                    return generateNRandomNotes(HitObject.StartTime, 0.78, 0.3, 0);
+                    return generateNRandomNotes(StartTime, 0.78, 0.3, 0);
 
-                return generateNRandomNotes(HitObject.StartTime, 0.85, 0.36, 0.03);
+                return generateNRandomNotes(StartTime, 0.85, 0.36, 0.03);
             }
 
             if (ConversionDifficulty > 4)
             {
                 if (convertType.HasFlag(PatternType.LowProbability))
-                    return generateNRandomNotes(HitObject.StartTime, 0.43, 0.08, 0);
+                    return generateNRandomNotes(StartTime, 0.43, 0.08, 0);
 
-                return generateNRandomNotes(HitObject.StartTime, 0.56, 0.18, 0);
+                return generateNRandomNotes(StartTime, 0.56, 0.18, 0);
             }
 
             if (ConversionDifficulty > 2.5)
             {
                 if (convertType.HasFlag(PatternType.LowProbability))
-                    return generateNRandomNotes(HitObject.StartTime, 0.3, 0, 0);
+                    return generateNRandomNotes(StartTime, 0.3, 0, 0);
 
-                return generateNRandomNotes(HitObject.StartTime, 0.37, 0.08, 0);
+                return generateNRandomNotes(StartTime, 0.37, 0.08, 0);
             }
 
             if (convertType.HasFlag(PatternType.LowProbability))
-                return generateNRandomNotes(HitObject.StartTime, 0.17, 0, 0);
+                return generateNRandomNotes(StartTime, 0.17, 0, 0);
 
-            return generateNRandomNotes(HitObject.StartTime, 0.27, 0, 0);
+            return generateNRandomNotes(StartTime, 0.27, 0, 0);
         }
 
         /// <summary>
@@ -167,7 +175,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// <param name="startTime">Start time of each hold note.</param>
         /// <param name="noteCount">Number of hold notes.</param>
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
-        private Pattern generateRandomHoldNotes(double startTime, int noteCount)
+        private Pattern generateRandomHoldNotes(int startTime, int noteCount)
         {
             // - - - -
             // ■ - ■ ■
@@ -202,7 +210,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// <param name="startTime">The start time.</param>
         /// <param name="noteCount">The number of notes.</param>
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
-        private Pattern generateRandomNotes(double startTime, int noteCount)
+        private Pattern generateRandomNotes(int startTime, int noteCount)
         {
             // - - - -
             // x - - -
@@ -234,7 +242,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         /// <param name="startTime">The start time.</param>
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
-        private Pattern generateStair(double startTime)
+        private Pattern generateStair(int startTime)
         {
             // - - - -
             // x - - -
@@ -286,7 +294,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         /// <param name="startTime">The start time.</param>
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
-        private Pattern generateRandomMultipleNotes(double startTime)
+        private Pattern generateRandomMultipleNotes(int startTime)
         {
             // - - - -
             // x - - -
@@ -329,7 +337,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// <param name="p3">The probability required for 3 hold notes to be generated.</param>
         /// <param name="p4">The probability required for 4 hold notes to be generated.</param>
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
-        private Pattern generateNRandomNotes(double startTime, double p2, double p3, double p4)
+        private Pattern generateNRandomNotes(int startTime, double p2, double p3, double p4)
         {
             // - - - -
             // ■ - ■ ■
@@ -366,7 +374,7 @@ 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.HasFlag(PatternType.LowProbability);
-            canGenerateTwoNotes &= HitObject.Samples.Any(isDoubleSample) || sampleInfoListAt(HitObject.StartTime).Any(isDoubleSample);
+            canGenerateTwoNotes &= HitObject.Samples.Any(isDoubleSample) || sampleInfoListAt(StartTime).Any(isDoubleSample);
 
             if (canGenerateTwoNotes)
                 p2 = 1;
@@ -379,7 +387,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         /// <param name="startTime">The first hold note start time.</param>
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
-        private Pattern generateTiledHoldNotes(double startTime)
+        private Pattern generateTiledHoldNotes(int startTime)
         {
             // - - - -
             // ■ ■ ■ ■
@@ -394,6 +402,9 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             int columnRepeat = Math.Min(SpanCount, TotalColumns);
 
+            // Due to integer rounding, this is not guaranteed to be the same as EndTime (the class-level variable).
+            int endTime = startTime + SegmentDuration * SpanCount;
+
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
                 nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);
@@ -401,7 +412,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             for (int i = 0; i < columnRepeat; i++)
             {
                 nextColumn = FindAvailableColumn(nextColumn, pattern);
-                addToPattern(pattern, nextColumn, startTime, EndTime);
+                addToPattern(pattern, nextColumn, startTime, endTime);
                 startTime += SegmentDuration;
             }
 
@@ -413,7 +424,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         /// <param name="startTime">The start time of notes.</param>
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
-        private Pattern generateHoldAndNormalNotes(double startTime)
+        private Pattern generateHoldAndNormalNotes(int startTime)
         {
             // - - - -
             // ■ x x -
@@ -448,7 +459,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             for (int i = 0; i <= SpanCount; i++)
             {
-                if (!(ignoreHead && startTime == HitObject.StartTime))
+                if (!(ignoreHead && startTime == StartTime))
                 {
                     for (int j = 0; j < noteCount; j++)
                     {
@@ -471,19 +482,18 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         /// <param name="time">The time to retrieve the sample info list from.</param>
         /// <returns></returns>
-        private IList<HitSampleInfo> sampleInfoListAt(double time) => nodeSamplesAt(time)?.First() ?? HitObject.Samples;
+        private IList<HitSampleInfo> sampleInfoListAt(int time) => nodeSamplesAt(time)?.First() ?? HitObject.Samples;
 
         /// <summary>
         /// Retrieves the list of node samples that occur at time greater than or equal to <paramref name="time"/>.
         /// </summary>
         /// <param name="time">The time to retrieve node samples at.</param>
-        private List<IList<HitSampleInfo>> nodeSamplesAt(double time)
+        private List<IList<HitSampleInfo>> nodeSamplesAt(int time)
         {
             if (!(HitObject is IHasPathWithRepeats curveData))
                 return null;
 
-            // mathematically speaking this should be a whole number always, but floating-point arithmetic is not so kind
-            var index = (int)Math.Round(SegmentDuration == 0 ? 0 : (time - HitObject.StartTime) / SegmentDuration, MidpointRounding.AwayFromZero);
+            var index = SegmentDuration == 0 ? 0 : (time - StartTime) / SegmentDuration;
 
             // avoid slicing the list & creating copies, if at all possible.
             return index == 0 ? curveData.NodeSamples : curveData.NodeSamples.Skip(index).ToList();
@@ -496,7 +506,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// <param name="column">The column to add the note to.</param>
         /// <param name="startTime">The start time of the note.</param>
         /// <param name="endTime">The end time of the note (set to <paramref name="startTime"/> for a non-hold note).</param>
-        private void addToPattern(Pattern pattern, int column, double startTime, double endTime)
+        private void addToPattern(Pattern pattern, int column, int startTime, int endTime)
         {
             ManiaHitObject newObject;
 

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/EndTimeObjectPatternGenerator.cs

@@ -14,12 +14,17 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 {
     internal class EndTimeObjectPatternGenerator : PatternGenerator
     {
-        private readonly double endTime;
+        private readonly int endTime;
+        private readonly PatternType convertType;
 
-        public EndTimeObjectPatternGenerator(FastRandom random, HitObject hitObject, ManiaBeatmap beatmap, IBeatmap originalBeatmap)
-            : base(random, hitObject, beatmap, new Pattern(), originalBeatmap)
+        public EndTimeObjectPatternGenerator(FastRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, IBeatmap originalBeatmap)
+            : base(random, hitObject, beatmap, previousPattern, originalBeatmap)
         {
-            endTime = (HitObject as IHasDuration)?.EndTime ?? 0;
+            endTime = (int)((HitObject as IHasDuration)?.EndTime ?? 0);
+
+            convertType = PreviousPattern.ColumnWithObjects == TotalColumns
+                ? PatternType.None
+                : PatternType.ForceNotStack;
         }
 
         public override IEnumerable<Pattern> Generate()
@@ -40,18 +45,25 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                     break;
 
                 case 8:
-                    addToPattern(pattern, FindAvailableColumn(GetRandomColumn(), PreviousPattern), generateHold);
+                    addToPattern(pattern, getRandomColumn(), generateHold);
                     break;
 
                 default:
-                    if (TotalColumns > 0)
-                        addToPattern(pattern, GetRandomColumn(), generateHold);
+                    addToPattern(pattern, getRandomColumn(0), generateHold);
                     break;
             }
 
             return pattern;
         }
 
+        private int getRandomColumn(int? lowerBound = null)
+        {
+            if ((convertType & PatternType.ForceNotStack) > 0)
+                return FindAvailableColumn(GetRandomColumn(lowerBound), lowerBound, patterns: PreviousPattern);
+
+            return FindAvailableColumn(GetRandomColumn(lowerBound), lowerBound);
+        }
+
         /// <summary>
         /// Constructs and adds a note to a pattern.
         /// </summary>

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs

@@ -397,7 +397,11 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
                 case 4:
                     centreProbability = 0;
-                    p2 = Math.Min(p2 * 2, 0.2);
+
+                    // Stable requires rngValue > x, which is an inverse-probability. Lazer uses true probability (1 - x).
+                    // But multiplying this value by 2 (stable) is not the same operation as dividing it by 2 (lazer),
+                    // so it needs to be converted to from a probability and then back after the multiplication.
+                    p2 = 1 - Math.Max((1 - p2) * 2, 0.8);
                     p3 = 0;
                     break;
 
@@ -408,11 +412,20 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
                 case 6:
                     centreProbability = 0;
-                    p2 = Math.Min(p2 * 2, 0.5);
-                    p3 = Math.Min(p3 * 2, 0.15);
+
+                    // Stable requires rngValue > x, which is an inverse-probability. Lazer uses true probability (1 - x).
+                    // But multiplying this value by 2 (stable) is not the same operation as dividing it by 2 (lazer),
+                    // so it needs to be converted to from a probability and then back after the multiplication.
+                    p2 = 1 - Math.Max((1 - p2) * 2, 0.5);
+                    p3 = 1 - Math.Max((1 - p3) * 2, 0.85);
                     break;
             }
 
+            // The stable values were allowed to exceed 1, which indicate <0% probability.
+            // These values needs to be clamped otherwise GetRandomNoteCount() will throw an exception.
+            p2 = Math.Clamp(p2, 0, 1);
+            p3 = Math.Clamp(p3, 0, 1);
+
             double centreVal = Random.NextDouble();
             int noteCount = GetRandomNoteCount(p2, p3);
 

osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyAttributes.cs

@@ -8,5 +8,6 @@ namespace osu.Game.Rulesets.Mania.Difficulty
     public class ManiaDifficultyAttributes : DifficultyAttributes
     {
         public double GreatHitWindow;
+        public double ScoreMultiplier;
     }
 }

osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyCalculator.cs

@@ -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.Game.Beatmaps;
@@ -10,10 +11,12 @@ using osu.Game.Rulesets.Difficulty.Skills;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Mania.Difficulty.Skills;
+using osu.Game.Rulesets.Mania.MathUtils;
 using osu.Game.Rulesets.Mania.Mods;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Scoring;
 using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Scoring;
 
 namespace osu.Game.Rulesets.Mania.Difficulty
@@ -23,11 +26,13 @@ namespace osu.Game.Rulesets.Mania.Difficulty
         private const double star_scaling_factor = 0.018;
 
         private readonly bool isForCurrentRuleset;
+        private readonly double originalOverallDifficulty;
 
         public ManiaDifficultyCalculator(Ruleset ruleset, WorkingBeatmap beatmap)
             : base(ruleset, beatmap)
         {
             isForCurrentRuleset = beatmap.BeatmapInfo.Ruleset.Equals(ruleset.RulesetInfo);
+            originalOverallDifficulty = beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty;
         }
 
         protected override DifficultyAttributes CreateDifficultyAttributes(IBeatmap beatmap, Mod[] mods, Skill[] skills, double clockRate)
@@ -40,64 +45,33 @@ namespace osu.Game.Rulesets.Mania.Difficulty
 
             return new ManiaDifficultyAttributes
             {
-                StarRating = difficultyValue(skills) * star_scaling_factor,
+                StarRating = skills[0].DifficultyValue() * star_scaling_factor,
                 Mods = mods,
                 // Todo: This int cast is temporary to achieve 1:1 results with osu!stable, and should be removed in the future
-                GreatHitWindow = (int)(hitWindows.WindowFor(HitResult.Great)) / clockRate,
+                GreatHitWindow = (int)Math.Ceiling(getHitWindow300(mods) / clockRate),
+                ScoreMultiplier = getScoreMultiplier(beatmap, mods),
                 MaxCombo = beatmap.HitObjects.Sum(h => h is HoldNote ? 2 : 1),
                 Skills = skills
             };
         }
 
-        private double difficultyValue(Skill[] skills)
-        {
-            // Preprocess the strains to find the maximum overall + individual (aggregate) strain from each section
-            var overall = skills.OfType<Overall>().Single();
-            var aggregatePeaks = new List<double>(Enumerable.Repeat(0.0, overall.StrainPeaks.Count));
-
-            foreach (var individual in skills.OfType<Individual>())
-            {
-                for (int i = 0; i < individual.StrainPeaks.Count; i++)
-                {
-                    double aggregate = individual.StrainPeaks[i] + overall.StrainPeaks[i];
-
-                    if (aggregate > aggregatePeaks[i])
-                        aggregatePeaks[i] = aggregate;
-                }
-            }
-
-            aggregatePeaks.Sort((a, b) => b.CompareTo(a)); // Sort from highest to lowest strain.
-
-            double difficulty = 0;
-            double weight = 1;
-
-            // Difficulty is the weighted sum of the highest strains from every section.
-            foreach (double strain in aggregatePeaks)
-            {
-                difficulty += strain * weight;
-                weight *= 0.9;
-            }
-
-            return difficulty;
-        }
-
         protected override IEnumerable<DifficultyHitObject> CreateDifficultyHitObjects(IBeatmap beatmap, double clockRate)
         {
-            for (int i = 1; i < beatmap.HitObjects.Count; i++)
-                yield return new ManiaDifficultyHitObject(beatmap.HitObjects[i], beatmap.HitObjects[i - 1], clockRate);
+            var sortedObjects = beatmap.HitObjects.ToArray();
+
+            LegacySortHelper<HitObject>.Sort(sortedObjects, Comparer<HitObject>.Create((a, b) => (int)Math.Round(a.StartTime) - (int)Math.Round(b.StartTime)));
+
+            for (int i = 1; i < sortedObjects.Length; i++)
+                yield return new ManiaDifficultyHitObject(sortedObjects[i], sortedObjects[i - 1], clockRate);
         }
 
-        protected override Skill[] CreateSkills(IBeatmap beatmap)
+        // Sorting is done in CreateDifficultyHitObjects, since the full list of hitobjects is required.
+        protected override IEnumerable<DifficultyHitObject> SortObjects(IEnumerable<DifficultyHitObject> input) => input;
+
+        protected override Skill[] CreateSkills(IBeatmap beatmap) => new Skill[]
         {
-            int columnCount = ((ManiaBeatmap)beatmap).TotalColumns;
-
-            var skills = new List<Skill> { new Overall(columnCount) };
-
-            for (int i = 0; i < columnCount; i++)
-                skills.Add(new Individual(i, columnCount));
-
-            return skills.ToArray();
-        }
+            new Strain(((ManiaBeatmap)beatmap).TotalColumns)
+        };
 
         protected override Mod[] DifficultyAdjustmentMods
         {
@@ -122,12 +96,73 @@ namespace osu.Game.Rulesets.Mania.Difficulty
                     new ManiaModKey3(),
                     new ManiaModKey4(),
                     new ManiaModKey5(),
+                    new MultiMod(new ManiaModKey5(), new ManiaModDualStages()),
                     new ManiaModKey6(),
+                    new MultiMod(new ManiaModKey6(), new ManiaModDualStages()),
                     new ManiaModKey7(),
+                    new MultiMod(new ManiaModKey7(), new ManiaModDualStages()),
                     new ManiaModKey8(),
+                    new MultiMod(new ManiaModKey8(), new ManiaModDualStages()),
                     new ManiaModKey9(),
+                    new MultiMod(new ManiaModKey9(), new ManiaModDualStages()),
                 }).ToArray();
             }
         }
+
+        private int getHitWindow300(Mod[] mods)
+        {
+            if (isForCurrentRuleset)
+            {
+                double od = Math.Min(10.0, Math.Max(0, 10.0 - originalOverallDifficulty));
+                return applyModAdjustments(34 + 3 * od, mods);
+            }
+
+            if (Math.Round(originalOverallDifficulty) > 4)
+                return applyModAdjustments(34, mods);
+
+            return applyModAdjustments(47, mods);
+
+            static int applyModAdjustments(double value, Mod[] mods)
+            {
+                if (mods.Any(m => m is ManiaModHardRock))
+                    value /= 1.4;
+                else if (mods.Any(m => m is ManiaModEasy))
+                    value *= 1.4;
+
+                if (mods.Any(m => m is ManiaModDoubleTime))
+                    value *= 1.5;
+                else if (mods.Any(m => m is ManiaModHalfTime))
+                    value *= 0.75;
+
+                return (int)value;
+            }
+        }
+
+        private double getScoreMultiplier(IBeatmap beatmap, Mod[] mods)
+        {
+            double scoreMultiplier = 1;
+
+            foreach (var m in mods)
+            {
+                switch (m)
+                {
+                    case ManiaModNoFail _:
+                    case ManiaModEasy _:
+                    case ManiaModHalfTime _:
+                        scoreMultiplier *= 0.5;
+                        break;
+                }
+            }
+
+            var maniaBeatmap = (ManiaBeatmap)beatmap;
+            int diff = maniaBeatmap.TotalColumns - maniaBeatmap.OriginalTotalColumns;
+
+            if (diff > 0)
+                scoreMultiplier *= 0.9;
+            else if (diff < 0)
+                scoreMultiplier *= 0.9 + 0.04 * diff;
+
+            return scoreMultiplier;
+        }
     }
 }

osu.Game.Rulesets.Mania/Difficulty/Skills/Individual.cs

@@ -1,47 +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 System.Linq;
-using osu.Game.Rulesets.Difficulty.Preprocessing;
-using osu.Game.Rulesets.Difficulty.Skills;
-using osu.Game.Rulesets.Mania.Difficulty.Preprocessing;
-using osu.Game.Rulesets.Objects;
-
-namespace osu.Game.Rulesets.Mania.Difficulty.Skills
-{
-    public class Individual : Skill
-    {
-        protected override double SkillMultiplier => 1;
-        protected override double StrainDecayBase => 0.125;
-
-        private readonly double[] holdEndTimes;
-
-        private readonly int column;
-
-        public Individual(int column, int columnCount)
-        {
-            this.column = column;
-
-            holdEndTimes = new double[columnCount];
-        }
-
-        protected override double StrainValueOf(DifficultyHitObject current)
-        {
-            var maniaCurrent = (ManiaDifficultyHitObject)current;
-            var endTime = maniaCurrent.BaseObject.GetEndTime();
-
-            try
-            {
-                if (maniaCurrent.BaseObject.Column != column)
-                    return 0;
-
-                // We give a slight bonus if something is held meanwhile
-                return holdEndTimes.Any(t => t > endTime) ? 2.5 : 2;
-            }
-            finally
-            {
-                holdEndTimes[maniaCurrent.BaseObject.Column] = endTime;
-            }
-        }
-    }
-}

osu.Game.Rulesets.Mania/Difficulty/Skills/Overall.cs

@@ -1,56 +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.Game.Rulesets.Difficulty.Preprocessing;
-using osu.Game.Rulesets.Difficulty.Skills;
-using osu.Game.Rulesets.Mania.Difficulty.Preprocessing;
-using osu.Game.Rulesets.Objects;
-
-namespace osu.Game.Rulesets.Mania.Difficulty.Skills
-{
-    public class Overall : Skill
-    {
-        protected override double SkillMultiplier => 1;
-        protected override double StrainDecayBase => 0.3;
-
-        private readonly double[] holdEndTimes;
-
-        private readonly int columnCount;
-
-        public Overall(int columnCount)
-        {
-            this.columnCount = columnCount;
-
-            holdEndTimes = new double[columnCount];
-        }
-
-        protected override double StrainValueOf(DifficultyHitObject current)
-        {
-            var maniaCurrent = (ManiaDifficultyHitObject)current;
-            var endTime = maniaCurrent.BaseObject.GetEndTime();
-
-            double holdFactor = 1.0; // Factor in case something else is held
-            double holdAddition = 0; // Addition to the current note in case it's a hold and has to be released awkwardly
-
-            for (int i = 0; i < columnCount; i++)
-            {
-                // If there is at least one other overlapping end or note, then we get an addition, buuuuuut...
-                if (current.BaseObject.StartTime < holdEndTimes[i] && endTime > holdEndTimes[i])
-                    holdAddition = 1.0;
-
-                // ... this addition only is valid if there is _no_ other note with the same ending.
-                // Releasing multiple notes at the same time is just as easy as releasing one
-                if (endTime == holdEndTimes[i])
-                    holdAddition = 0;
-
-                // We give a slight bonus if something is held meanwhile
-                if (holdEndTimes[i] > endTime)
-                    holdFactor = 1.25;
-            }
-
-            holdEndTimes[maniaCurrent.BaseObject.Column] = endTime;
-
-            return (1 + holdAddition) * holdFactor;
-        }
-    }
-}

osu.Game.Rulesets.Mania/Difficulty/Skills/Strain.cs

@@ -0,0 +1,80 @@
+// 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.Utils;
+using osu.Game.Rulesets.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Difficulty.Skills;
+using osu.Game.Rulesets.Mania.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Objects;
+
+namespace osu.Game.Rulesets.Mania.Difficulty.Skills
+{
+    public class Strain : Skill
+    {
+        private const double individual_decay_base = 0.125;
+        private const double overall_decay_base = 0.30;
+
+        protected override double SkillMultiplier => 1;
+        protected override double StrainDecayBase => 1;
+
+        private readonly double[] holdEndTimes;
+        private readonly double[] individualStrains;
+
+        private double individualStrain;
+        private double overallStrain;
+
+        public Strain(int totalColumns)
+        {
+            holdEndTimes = new double[totalColumns];
+            individualStrains = new double[totalColumns];
+            overallStrain = 1;
+        }
+
+        protected override double StrainValueOf(DifficultyHitObject current)
+        {
+            var maniaCurrent = (ManiaDifficultyHitObject)current;
+            var endTime = maniaCurrent.BaseObject.GetEndTime();
+            var column = maniaCurrent.BaseObject.Column;
+
+            double holdFactor = 1.0; // Factor to all additional strains in case something else is held
+            double holdAddition = 0; // Addition to the current note in case it's a hold and has to be released awkwardly
+
+            // Fill up the holdEndTimes array
+            for (int i = 0; i < holdEndTimes.Length; ++i)
+            {
+                // If there is at least one other overlapping end or note, then we get an addition, buuuuuut...
+                if (Precision.DefinitelyBigger(holdEndTimes[i], maniaCurrent.BaseObject.StartTime, 1) && Precision.DefinitelyBigger(endTime, holdEndTimes[i], 1))
+                    holdAddition = 1.0;
+
+                // ... this addition only is valid if there is _no_ other note with the same ending. Releasing multiple notes at the same time is just as easy as releasing 1
+                if (Precision.AlmostEquals(endTime, holdEndTimes[i], 1))
+                    holdAddition = 0;
+
+                // We give a slight bonus to everything if something is held meanwhile
+                if (Precision.DefinitelyBigger(holdEndTimes[i], endTime, 1))
+                    holdFactor = 1.25;
+
+                // Decay individual strains
+                individualStrains[i] = applyDecay(individualStrains[i], current.DeltaTime, individual_decay_base);
+            }
+
+            holdEndTimes[column] = endTime;
+
+            // Increase individual strain in own column
+            individualStrains[column] += 2.0 * holdFactor;
+            individualStrain = individualStrains[column];
+
+            overallStrain = applyDecay(overallStrain, current.DeltaTime, overall_decay_base) + (1 + holdAddition) * holdFactor;
+
+            return individualStrain + overallStrain - CurrentStrain;
+        }
+
+        protected override double GetPeakStrain(double offset)
+            => applyDecay(individualStrain, offset - Previous[0].BaseObject.StartTime, individual_decay_base)
+               + applyDecay(overallStrain, offset - Previous[0].BaseObject.StartTime, overall_decay_base);
+
+        private double applyDecay(double value, double deltaTime, double decayBase)
+            => value * Math.Pow(decayBase, deltaTime / 1000);
+    }
+}

osu.Game.Rulesets.Mania/Edit/ManiaSelectionHandler.cs

@@ -45,7 +45,7 @@ namespace osu.Game.Rulesets.Mania.Edit
             int minColumn = int.MaxValue;
             int maxColumn = int.MinValue;
 
-            foreach (var obj in SelectedHitObjects.OfType<ManiaHitObject>())
+            foreach (var obj in EditorBeatmap.SelectedHitObjects.OfType<ManiaHitObject>())
             {
                 if (obj.Column < minColumn)
                     minColumn = obj.Column;
@@ -55,7 +55,7 @@ namespace osu.Game.Rulesets.Mania.Edit
 
             columnDelta = Math.Clamp(columnDelta, -minColumn, maniaPlayfield.TotalColumns - 1 - maxColumn);
 
-            foreach (var obj in SelectedHitObjects.OfType<ManiaHitObject>())
+            foreach (var obj in EditorBeatmap.SelectedHitObjects.OfType<ManiaHitObject>())
                 obj.Column += columnDelta;
         }
     }

osu.Game.Rulesets.Mania/ManiaRuleset.cs

@@ -319,6 +319,31 @@ namespace osu.Game.Rulesets.Mania
             return (PlayfieldType)Enum.GetValues(typeof(PlayfieldType)).Cast<int>().OrderByDescending(i => i).First(v => variant >= v);
         }
 
+        protected override IEnumerable<HitResult> GetValidHitResults()
+        {
+            return new[]
+            {
+                HitResult.Perfect,
+                HitResult.Great,
+                HitResult.Good,
+                HitResult.Ok,
+                HitResult.Meh,
+
+                HitResult.LargeTickHit,
+            };
+        }
+
+        public override string GetDisplayNameForHitResult(HitResult result)
+        {
+            switch (result)
+            {
+                case HitResult.LargeTickHit:
+                    return "hold tick";
+            }
+
+            return base.GetDisplayNameForHitResult(result);
+        }
+
         public override StatisticRow[] CreateStatisticsForScore(ScoreInfo score, IBeatmap playableBeatmap) => new[]
         {
             new StatisticRow

osu.Game.Rulesets.Mania/MathUtils/LegacySortHelper.cs

@@ -0,0 +1,165 @@
+// 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.Diagnostics.Contracts;
+
+namespace osu.Game.Rulesets.Mania.MathUtils
+{
+    /// <summary>
+    /// Provides access to .NET4.0 unstable sorting methods.
+    /// </summary>
+    /// <remarks>
+    /// Source: https://referencesource.microsoft.com/#mscorlib/system/collections/generic/arraysorthelper.cs
+    /// Copyright (c) Microsoft Corporation.  All rights reserved.
+    /// </remarks>
+    internal static class LegacySortHelper<T>
+    {
+        private const int quick_sort_depth_threshold = 32;
+
+        public static void Sort(T[] keys, IComparer<T> comparer)
+        {
+            if (keys == null)
+                throw new ArgumentNullException(nameof(keys));
+
+            if (keys.Length == 0)
+                return;
+
+            comparer ??= Comparer<T>.Default;
+            depthLimitedQuickSort(keys, 0, keys.Length - 1, comparer, quick_sort_depth_threshold);
+        }
+
+        private static void depthLimitedQuickSort(T[] keys, int left, int right, IComparer<T> comparer, int depthLimit)
+        {
+            do
+            {
+                if (depthLimit == 0)
+                {
+                    heapsort(keys, left, right, comparer);
+                    return;
+                }
+
+                int i = left;
+                int j = right;
+
+                // pre-sort the low, middle (pivot), and high values in place.
+                // this improves performance in the face of already sorted data, or
+                // data that is made up of multiple sorted runs appended together.
+                int middle = i + ((j - i) >> 1);
+                swapIfGreater(keys, comparer, i, middle); // swap the low with the mid point
+                swapIfGreater(keys, comparer, i, j); // swap the low with the high
+                swapIfGreater(keys, comparer, middle, j); // swap the middle with the high
+
+                T x = keys[middle];
+
+                do
+                {
+                    while (comparer.Compare(keys[i], x) < 0) i++;
+                    while (comparer.Compare(x, keys[j]) < 0) j--;
+                    Contract.Assert(i >= left && j <= right, "(i>=left && j<=right)  Sort failed - Is your IComparer bogus?");
+                    if (i > j) break;
+
+                    if (i < j)
+                    {
+                        T key = keys[i];
+                        keys[i] = keys[j];
+                        keys[j] = key;
+                    }
+
+                    i++;
+                    j--;
+                } while (i <= j);
+
+                // The next iteration of the while loop is to "recursively" sort the larger half of the array and the
+                // following calls recrusively sort the smaller half.  So we subtrack one from depthLimit here so
+                // both sorts see the new value.
+                depthLimit--;
+
+                if (j - left <= right - i)
+                {
+                    if (left < j) depthLimitedQuickSort(keys, left, j, comparer, depthLimit);
+                    left = i;
+                }
+                else
+                {
+                    if (i < right) depthLimitedQuickSort(keys, i, right, comparer, depthLimit);
+                    right = j;
+                }
+            } while (left < right);
+        }
+
+        private static void heapsort(T[] keys, int lo, int hi, IComparer<T> comparer)
+        {
+            Contract.Requires(keys != null);
+            Contract.Requires(comparer != null);
+            Contract.Requires(lo >= 0);
+            Contract.Requires(hi > lo);
+            Contract.Requires(hi < keys.Length);
+
+            int n = hi - lo + 1;
+
+            for (int i = n / 2; i >= 1; i = i - 1)
+            {
+                downHeap(keys, i, n, lo, comparer);
+            }
+
+            for (int i = n; i > 1; i = i - 1)
+            {
+                swap(keys, lo, lo + i - 1);
+                downHeap(keys, 1, i - 1, lo, comparer);
+            }
+        }
+
+        private static void downHeap(T[] keys, int i, int n, int lo, IComparer<T> comparer)
+        {
+            Contract.Requires(keys != null);
+            Contract.Requires(comparer != null);
+            Contract.Requires(lo >= 0);
+            Contract.Requires(lo < keys.Length);
+
+            T d = keys[lo + i - 1];
+
+            while (i <= n / 2)
+            {
+                var child = 2 * i;
+
+                if (child < n && comparer.Compare(keys[lo + child - 1], keys[lo + child]) < 0)
+                {
+                    child++;
+                }
+
+                if (!(comparer.Compare(d, keys[lo + child - 1]) < 0))
+                    break;
+
+                keys[lo + i - 1] = keys[lo + child - 1];
+                i = child;
+            }
+
+            keys[lo + i - 1] = d;
+        }
+
+        private static void swap(T[] a, int i, int j)
+        {
+            if (i != j)
+            {
+                T t = a[i];
+                a[i] = a[j];
+                a[j] = t;
+            }
+        }
+
+        private static void swapIfGreater(T[] keys, IComparer<T> comparer, int a, int b)
+        {
+            if (a != b)
+            {
+                if (comparer.Compare(keys[a], keys[b]) > 0)
+                {
+                    T key = keys[a];
+                    keys[a] = keys[b];
+                    keys[b] = key;
+                }
+            }
+        }
+    }
+}

osu.Game.Rulesets.Mania/Mods/ManiaKeyMod.cs

@@ -39,6 +39,7 @@ namespace osu.Game.Rulesets.Mania.Mods
             typeof(ManiaModKey7),
             typeof(ManiaModKey8),
             typeof(ManiaModKey9),
+            typeof(ManiaModKey10),
         }.Except(new[] { GetType() }).ToArray();
     }
 }

osu.Game.Rulesets.Mania/Resources/Testing/Beatmaps/convert-samples-expected-conversion.json

@@ -10,7 +10,7 @@
         ["soft-hitnormal"],
         ["drum-hitnormal"]
       ],
-      "Samples": ["drum-hitnormal"]
+      "Samples": ["-hitnormal"]
     }, {
       "StartTime": 1875.0,
       "EndTime": 2750.0,
@@ -19,7 +19,7 @@
         ["soft-hitnormal"],
         ["drum-hitnormal"]
       ],
-      "Samples": ["drum-hitnormal"]
+      "Samples": ["-hitnormal"]
     }]
   }, {
     "StartTime": 3750.0,

osu.Game.Rulesets.Osu/Edit/Blueprints/HitCircles/HitCirclePlacementBlueprint.cs

@@ -21,6 +21,12 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles
             InternalChild = circlePiece = new HitCirclePiece();
         }
 
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            BeginPlacement();
+        }
+
         protected override void Update()
         {
             base.Update();

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/SliderBodyPiece.cs

@@ -49,6 +49,8 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             OriginPosition = body.PathOffset;
         }
 
+        public void RecyclePath() => body.RecyclePath();
+
         public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => body.ReceivePositionalInputAt(screenSpacePos);
     }
 }

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs

@@ -24,10 +24,12 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 {
     public class SliderSelectionBlueprint : OsuSelectionBlueprint<Slider>
     {
-        protected readonly SliderBodyPiece BodyPiece;
-        protected readonly SliderCircleSelectionBlueprint HeadBlueprint;
-        protected readonly SliderCircleSelectionBlueprint TailBlueprint;
-        protected readonly PathControlPointVisualiser ControlPointVisualiser;
+        protected SliderBodyPiece BodyPiece { get; private set; }
+        protected SliderCircleSelectionBlueprint HeadBlueprint { get; private set; }
+        protected SliderCircleSelectionBlueprint TailBlueprint { get; private set; }
+        protected PathControlPointVisualiser ControlPointVisualiser { get; private set; }
+
+        private readonly DrawableSlider slider;
 
         [Resolved(CanBeNull = true)]
         private HitObjectComposer composer { get; set; }
@@ -44,17 +46,17 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         public SliderSelectionBlueprint(DrawableSlider slider)
             : base(slider)
         {
-            var sliderObject = (Slider)slider.HitObject;
+            this.slider = slider;
+        }
 
+        [BackgroundDependencyLoader]
+        private void load()
+        {
             InternalChildren = new Drawable[]
             {
                 BodyPiece = new SliderBodyPiece(),
                 HeadBlueprint = CreateCircleSelectionBlueprint(slider, SliderPosition.Start),
                 TailBlueprint = CreateCircleSelectionBlueprint(slider, SliderPosition.End),
-                ControlPointVisualiser = new PathControlPointVisualiser(sliderObject, true)
-                {
-                    RemoveControlPointsRequested = removeControlPoints
-                }
             };
         }
 
@@ -66,13 +68,35 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
             pathVersion = HitObject.Path.Version.GetBoundCopy();
             pathVersion.BindValueChanged(_ => updatePath());
+
+            BodyPiece.UpdateFrom(HitObject);
         }
 
         protected override void Update()
         {
             base.Update();
 
-            BodyPiece.UpdateFrom(HitObject);
+            if (IsSelected)
+                BodyPiece.UpdateFrom(HitObject);
+        }
+
+        protected override void OnSelected()
+        {
+            AddInternal(ControlPointVisualiser = new PathControlPointVisualiser((Slider)slider.HitObject, true)
+            {
+                RemoveControlPointsRequested = removeControlPoints
+            });
+
+            base.OnSelected();
+        }
+
+        protected override void OnDeselected()
+        {
+            base.OnDeselected();
+
+            // throw away frame buffers on deselection.
+            ControlPointVisualiser?.Expire();
+            BodyPiece.RecyclePath();
         }
 
         private Vector2 rightClickPosition;
@@ -182,7 +206,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         private void updatePath()
         {
             HitObject.Path.ExpectedDistance.Value = composer?.GetSnappedDistanceFromDistance(HitObject.StartTime, (float)HitObject.Path.CalculatedDistance) ?? (float)HitObject.Path.CalculatedDistance;
-            editorBeatmap?.UpdateHitObject(HitObject);
+            editorBeatmap?.Update(HitObject);
         }
 
         public override MenuItem[] ContextMenuItems => new MenuItem[]

osu.Game.Rulesets.Osu/Edit/OsuSelectionHandler.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Primitives;
 using osu.Framework.Utils;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Screens.Edit.Compose.Components;
@@ -20,11 +21,12 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
             base.OnSelectionChanged();
 
-            bool canOperate = SelectedHitObjects.Count() > 1 || SelectedHitObjects.Any(s => s is Slider);
+            bool canOperate = EditorBeatmap.SelectedHitObjects.Count > 1 || EditorBeatmap.SelectedHitObjects.Any(s => s is Slider);
 
             SelectionBox.CanRotate = canOperate;
             SelectionBox.CanScaleX = canOperate;
             SelectionBox.CanScaleY = canOperate;
+            SelectionBox.CanReverse = canOperate;
         }
 
         protected override void OnOperationEnded()
@@ -41,6 +43,54 @@ namespace osu.Game.Rulesets.Osu.Edit
         /// </summary>
         private Vector2? referenceOrigin;
 
+        public override bool HandleReverse()
+        {
+            var hitObjects = selectedMovableObjects;
+
+            double endTime = hitObjects.Max(h => h.GetEndTime());
+            double startTime = hitObjects.Min(h => h.StartTime);
+
+            bool moreThanOneObject = hitObjects.Length > 1;
+
+            foreach (var h in hitObjects)
+            {
+                if (moreThanOneObject)
+                    h.StartTime = endTime - (h.GetEndTime() - startTime);
+
+                if (h is Slider slider)
+                {
+                    var points = slider.Path.ControlPoints.ToArray();
+                    Vector2 endPos = points.Last().Position.Value;
+
+                    slider.Path.ControlPoints.Clear();
+
+                    slider.Position += endPos;
+
+                    PathType? lastType = null;
+
+                    for (var i = 0; i < points.Length; i++)
+                    {
+                        var p = points[i];
+                        p.Position.Value -= endPos;
+
+                        // propagate types forwards to last null type
+                        if (i == points.Length - 1)
+                            p.Type.Value = lastType;
+                        else if (p.Type.Value != null)
+                        {
+                            var newType = p.Type.Value;
+                            p.Type.Value = lastType;
+                            lastType = newType;
+                        }
+
+                        slider.Path.ControlPoints.Insert(0, p);
+                    }
+                }
+            }
+
+            return true;
+        }
+
         public override bool HandleFlip(Direction direction)
         {
             var hitObjects = selectedMovableObjects;
@@ -182,7 +232,7 @@ namespace osu.Game.Rulesets.Osu.Edit
         /// <param name="points">The points to calculate a quad for.</param>
         private Quad getSurroundingQuad(IEnumerable<Vector2> points)
         {
-            if (!SelectedHitObjects.Any())
+            if (!EditorBeatmap.SelectedHitObjects.Any())
                 return new Quad();
 
             Vector2 minPosition = new Vector2(float.MaxValue, float.MaxValue);
@@ -203,10 +253,10 @@ namespace osu.Game.Rulesets.Osu.Edit
         /// <summary>
         /// All osu! hitobjects which can be moved/rotated/scaled.
         /// </summary>
-        private OsuHitObject[] selectedMovableObjects => SelectedHitObjects
-                                                         .OfType<OsuHitObject>()
-                                                         .Where(h => !(h is Spinner))
-                                                         .ToArray();
+        private OsuHitObject[] selectedMovableObjects => EditorBeatmap.SelectedHitObjects
+                                                                      .OfType<OsuHitObject>()
+                                                                      .Where(h => !(h is Spinner))
+                                                                      .ToArray();
 
         /// <summary>
         /// Rotate a point around an arbitrary origin.

osu.Game.Rulesets.Osu/Mods/OsuModHidden.cs

@@ -42,7 +42,11 @@ namespace osu.Game.Rulesets.Osu.Mods
         private double lastSliderHeadFadeOutStartTime;
         private double lastSliderHeadFadeOutDuration;
 
-        protected override void ApplyHiddenState(DrawableHitObject drawable, ArmedState state)
+        protected override void ApplyFirstObjectIncreaseVisibilityState(DrawableHitObject drawable, ArmedState state) => applyState(drawable, true);
+
+        protected override void ApplyHiddenState(DrawableHitObject drawable, ArmedState state) => applyState(drawable, false);
+
+        private void applyState(DrawableHitObject drawable, bool increaseVisibility)
         {
             if (!(drawable is DrawableOsuHitObject d))
                 return;
@@ -86,14 +90,23 @@ namespace osu.Game.Rulesets.Osu.Mods
                         lastSliderHeadFadeOutStartTime = fadeOutStartTime;
                     }
 
-                    // we don't want to see the approach circle
-                    using (circle.BeginAbsoluteSequence(h.StartTime - h.TimePreempt, true))
-                        circle.ApproachCircle.Hide();
+                    Drawable fadeTarget = circle;
+
+                    if (increaseVisibility)
+                    {
+                        // only fade the circle piece (not the approach circle) for the increased visibility object.
+                        fadeTarget = circle.CirclePiece;
+                    }
+                    else
+                    {
+                        // we don't want to see the approach circle
+                        using (circle.BeginAbsoluteSequence(h.StartTime - h.TimePreempt, true))
+                            circle.ApproachCircle.Hide();
+                    }
 
                     // fade out immediately after fade in.
                     using (drawable.BeginAbsoluteSequence(fadeOutStartTime, true))
-                        circle.FadeOut(fadeOutDuration);
-
+                        fadeTarget.FadeOut(fadeOutDuration);
                     break;
 
                 case DrawableSlider slider:

osu.Game.Rulesets.Osu/Objects/Slider.cs

@@ -137,6 +137,10 @@ namespace osu.Game.Rulesets.Osu.Objects
 
             Velocity = scoringDistance / timingPoint.BeatLength;
             TickDistance = scoringDistance / difficulty.SliderTickRate * TickDistanceMultiplier;
+
+            // The samples should be attached to the slider tail, however this can only be done after LegacyLastTick is removed otherwise they would play earlier than they're intended to.
+            // For now, the samples are attached to and played by the slider itself at the correct end time.
+            Samples = this.GetNodeSamples(repeatCount + 1);
         }
 
         protected override void CreateNestedHitObjects(CancellationToken cancellationToken)
@@ -230,15 +234,12 @@ namespace osu.Game.Rulesets.Osu.Objects
                 tick.Samples = sampleList;
 
             foreach (var repeat in NestedHitObjects.OfType<SliderRepeat>())
-                repeat.Samples = getNodeSamples(repeat.RepeatIndex + 1);
+                repeat.Samples = this.GetNodeSamples(repeat.RepeatIndex + 1);
 
             if (HeadCircle != null)
-                HeadCircle.Samples = getNodeSamples(0);
+                HeadCircle.Samples = this.GetNodeSamples(0);
         }
 
-        private IList<HitSampleInfo> getNodeSamples(int nodeIndex) =>
-            nodeIndex < NodeSamples.Count ? NodeSamples[nodeIndex] : Samples;
-
         public override Judgement CreateJudgement() => new OsuIgnoreJudgement();
 
         protected override HitWindows CreateHitWindows() => HitWindows.Empty;

osu.Game.Rulesets.Osu/OsuRuleset.cs

@@ -191,6 +191,41 @@ namespace osu.Game.Rulesets.Osu
 
         public override IRulesetConfigManager CreateConfig(SettingsStore settings) => new OsuRulesetConfigManager(settings, RulesetInfo);
 
+        protected override IEnumerable<HitResult> GetValidHitResults()
+        {
+            return new[]
+            {
+                HitResult.Great,
+                HitResult.Ok,
+                HitResult.Meh,
+
+                HitResult.LargeTickHit,
+                HitResult.SmallTickHit,
+                HitResult.SmallBonus,
+                HitResult.LargeBonus,
+            };
+        }
+
+        public override string GetDisplayNameForHitResult(HitResult result)
+        {
+            switch (result)
+            {
+                case HitResult.LargeTickHit:
+                    return "slider tick";
+
+                case HitResult.SmallTickHit:
+                    return "slider end";
+
+                case HitResult.SmallBonus:
+                    return "spinner spin";
+
+                case HitResult.LargeBonus:
+                    return "spinner bonus";
+            }
+
+            return base.GetDisplayNameForHitResult(result);
+        }
+
         public override StatisticRow[] CreateStatisticsForScore(ScoreInfo score, IBeatmap playableBeatmap)
         {
             var timedHitEvents = score.HitEvents.Where(e => e.HitObject is HitCircle && !(e.HitObject is SliderTailCircle)).ToList();

osu.Game.Rulesets.Taiko/Beatmaps/TaikoBeatmapConverter.cs

@@ -65,7 +65,7 @@ namespace osu.Game.Rulesets.Taiko.Beatmaps
                 converted.HitObjects = converted.HitObjects.GroupBy(t => t.StartTime).Select(x =>
                 {
                     TaikoHitObject first = x.First();
-                    if (x.Skip(1).Any() && !(first is Swell))
+                    if (x.Skip(1).Any() && first.CanBeStrong)
                         first.IsStrong = true;
                     return first;
                 }).ToList();

osu.Game.Rulesets.Taiko/Edit/TaikoSelectionHandler.cs

@@ -52,32 +52,32 @@ namespace osu.Game.Rulesets.Taiko.Edit
 
         public void SetStrongState(bool state)
         {
-            var hits = SelectedHitObjects.OfType<Hit>();
+            var hits = EditorBeatmap.SelectedHitObjects.OfType<Hit>();
 
-            ChangeHandler.BeginChange();
+            EditorBeatmap.BeginChange();
 
             foreach (var h in hits)
             {
                 if (h.IsStrong != state)
                 {
                     h.IsStrong = state;
-                    EditorBeatmap.UpdateHitObject(h);
+                    EditorBeatmap.Update(h);
                 }
             }
 
-            ChangeHandler.EndChange();
+            EditorBeatmap.EndChange();
         }
 
         public void SetRimState(bool state)
         {
-            var hits = SelectedHitObjects.OfType<Hit>();
+            var hits = EditorBeatmap.SelectedHitObjects.OfType<Hit>();
 
-            ChangeHandler.BeginChange();
+            EditorBeatmap.BeginChange();
 
             foreach (var h in hits)
                 h.Type = state ? HitType.Rim : HitType.Centre;
 
-            ChangeHandler.EndChange();
+            EditorBeatmap.EndChange();
         }
 
         protected override IEnumerable<MenuItem> GetContextMenuItemsForSelection(IEnumerable<SelectionBlueprint> selection)
@@ -89,12 +89,14 @@ namespace osu.Game.Rulesets.Taiko.Edit
                 yield return new TernaryStateMenuItem("Strong") { State = { BindTarget = selectionStrongState } };
         }
 
+        public override bool HandleMovement(MoveSelectionEvent moveEvent) => true;
+
         protected override void UpdateTernaryStates()
         {
             base.UpdateTernaryStates();
 
-            selectionRimState.Value = GetStateFromSelection(SelectedHitObjects.OfType<Hit>(), h => h.Type == HitType.Rim);
-            selectionStrongState.Value = GetStateFromSelection(SelectedHitObjects.OfType<TaikoHitObject>(), h => h.IsStrong);
+            selectionRimState.Value = GetStateFromSelection(EditorBeatmap.SelectedHitObjects.OfType<Hit>(), h => h.Type == HitType.Rim);
+            selectionStrongState.Value = GetStateFromSelection(EditorBeatmap.SelectedHitObjects.OfType<TaikoHitObject>(), h => h.IsStrong);
         }
     }
 }

osu.Game.Rulesets.Taiko/Objects/Drawables/DrawableTaikoHitObject.cs

@@ -158,7 +158,8 @@ namespace osu.Game.Rulesets.Taiko.Objects.Drawables
         {
             base.LoadSamples();
 
-            isStrong.Value = getStrongSamples().Any();
+            if (HitObject.CanBeStrong)
+                isStrong.Value = getStrongSamples().Any();
         }
 
         private void updateSamplesFromStrong()

osu.Game.Rulesets.Taiko/Objects/Swell.cs

@@ -17,6 +17,8 @@ namespace osu.Game.Rulesets.Taiko.Objects
             set => Duration = value - StartTime;
         }
 
+        public override bool CanBeStrong => false;
+
         public double Duration { get; set; }
 
         /// <summary>

osu.Game.Rulesets.Taiko/Objects/TaikoHitObject.cs

@@ -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.Threading;
 using osu.Framework.Bindables;
 using osu.Game.Rulesets.Judgements;
@@ -30,6 +31,11 @@ namespace osu.Game.Rulesets.Taiko.Objects
 
         public readonly Bindable<bool> IsStrongBindable = new BindableBool();
 
+        /// <summary>
+        /// Whether this <see cref="TaikoHitObject"/> can be made a "strong" (large) hit.
+        /// </summary>
+        public virtual bool CanBeStrong => true;
+
         /// <summary>
         /// Whether this HitObject is a "strong" type.
         /// Strong hit objects give more points for hitting the hit object with both keys.
@@ -37,7 +43,13 @@ namespace osu.Game.Rulesets.Taiko.Objects
         public bool IsStrong
         {
             get => IsStrongBindable.Value;
-            set => IsStrongBindable.Value = value;
+            set
+            {
+                if (value && !CanBeStrong)
+                    throw new InvalidOperationException($"Object of type {GetType()} cannot be strong");
+
+                IsStrongBindable.Value = value;
+            }
         }
 
         protected override void CreateNestedHitObjects(CancellationToken cancellationToken)

osu.Game.Rulesets.Taiko/TaikoRuleset.cs

@@ -159,6 +159,33 @@ namespace osu.Game.Rulesets.Taiko
 
         public override IConvertibleReplayFrame CreateConvertibleReplayFrame() => new TaikoReplayFrame();
 
+        protected override IEnumerable<HitResult> GetValidHitResults()
+        {
+            return new[]
+            {
+                HitResult.Great,
+                HitResult.Ok,
+
+                HitResult.SmallTickHit,
+
+                HitResult.SmallBonus,
+            };
+        }
+
+        public override string GetDisplayNameForHitResult(HitResult result)
+        {
+            switch (result)
+            {
+                case HitResult.SmallTickHit:
+                    return "drum tick";
+
+                case HitResult.SmallBonus:
+                    return "strong bonus";
+            }
+
+            return base.GetDisplayNameForHitResult(result);
+        }
+
         public override StatisticRow[] CreateStatisticsForScore(ScoreInfo score, IBeatmap playableBeatmap)
         {
             var timedHitEvents = score.HitEvents.Where(e => e.HitObject is Hit).ToList();

osu.Game.Tests/Beatmaps/BeatmapDifficultyManagerTest.cs

@@ -28,5 +28,28 @@ namespace osu.Game.Tests.Beatmaps
 
             Assert.That(key1, Is.EqualTo(key2));
         }
+
+        [TestCase(1.3, DifficultyRating.Easy)]
+        [TestCase(1.993, DifficultyRating.Easy)]
+        [TestCase(1.998, DifficultyRating.Normal)]
+        [TestCase(2.4, DifficultyRating.Normal)]
+        [TestCase(2.693, DifficultyRating.Normal)]
+        [TestCase(2.698, DifficultyRating.Hard)]
+        [TestCase(3.5, DifficultyRating.Hard)]
+        [TestCase(3.993, DifficultyRating.Hard)]
+        [TestCase(3.997, DifficultyRating.Insane)]
+        [TestCase(5.0, DifficultyRating.Insane)]
+        [TestCase(5.292, DifficultyRating.Insane)]
+        [TestCase(5.297, DifficultyRating.Expert)]
+        [TestCase(6.2, DifficultyRating.Expert)]
+        [TestCase(6.493, DifficultyRating.Expert)]
+        [TestCase(6.498, DifficultyRating.ExpertPlus)]
+        [TestCase(8.3, DifficultyRating.ExpertPlus)]
+        public void TestDifficultyRatingMapping(double starRating, DifficultyRating expectedBracket)
+        {
+            var actualBracket = BeatmapDifficultyManager.GetDifficultyRating(starRating);
+
+            Assert.AreEqual(expectedBracket, actualBracket);
+        }
     }
 }

osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapDecoderTest.cs

@@ -651,5 +651,63 @@ namespace osu.Game.Tests.Beatmaps.Formats
                 Assert.IsInstanceOf<LegacyDifficultyCalculatorBeatmapDecoder>(decoder);
             }
         }
+
+        [Test]
+        public void TestMultiSegmentSliders()
+        {
+            var decoder = new LegacyBeatmapDecoder { ApplyOffsets = false };
+
+            using (var resStream = TestResources.OpenResource("multi-segment-slider.osu"))
+            using (var stream = new LineBufferedReader(resStream))
+            {
+                var decoded = decoder.Decode(stream);
+
+                // Multi-segment
+                var first = ((IHasPath)decoded.HitObjects[0]).Path;
+
+                Assert.That(first.ControlPoints[0].Position.Value, Is.EqualTo(Vector2.Zero));
+                Assert.That(first.ControlPoints[0].Type.Value, Is.EqualTo(PathType.PerfectCurve));
+                Assert.That(first.ControlPoints[1].Position.Value, Is.EqualTo(new Vector2(161, -244)));
+                Assert.That(first.ControlPoints[1].Type.Value, Is.EqualTo(null));
+
+                Assert.That(first.ControlPoints[2].Position.Value, Is.EqualTo(new Vector2(376, -3)));
+                Assert.That(first.ControlPoints[2].Type.Value, Is.EqualTo(PathType.Bezier));
+                Assert.That(first.ControlPoints[3].Position.Value, Is.EqualTo(new Vector2(68, 15)));
+                Assert.That(first.ControlPoints[3].Type.Value, Is.EqualTo(null));
+                Assert.That(first.ControlPoints[4].Position.Value, Is.EqualTo(new Vector2(259, -132)));
+                Assert.That(first.ControlPoints[4].Type.Value, Is.EqualTo(null));
+                Assert.That(first.ControlPoints[5].Position.Value, Is.EqualTo(new Vector2(92, -107)));
+                Assert.That(first.ControlPoints[5].Type.Value, Is.EqualTo(null));
+
+                // Single-segment
+                var second = ((IHasPath)decoded.HitObjects[1]).Path;
+
+                Assert.That(second.ControlPoints[0].Position.Value, Is.EqualTo(Vector2.Zero));
+                Assert.That(second.ControlPoints[0].Type.Value, Is.EqualTo(PathType.PerfectCurve));
+                Assert.That(second.ControlPoints[1].Position.Value, Is.EqualTo(new Vector2(161, -244)));
+                Assert.That(second.ControlPoints[1].Type.Value, Is.EqualTo(null));
+                Assert.That(second.ControlPoints[2].Position.Value, Is.EqualTo(new Vector2(376, -3)));
+                Assert.That(second.ControlPoints[2].Type.Value, Is.EqualTo(null));
+
+                // Implicit multi-segment
+                var third = ((IHasPath)decoded.HitObjects[2]).Path;
+
+                Assert.That(third.ControlPoints[0].Position.Value, Is.EqualTo(Vector2.Zero));
+                Assert.That(third.ControlPoints[0].Type.Value, Is.EqualTo(PathType.Bezier));
+                Assert.That(third.ControlPoints[1].Position.Value, Is.EqualTo(new Vector2(0, 192)));
+                Assert.That(third.ControlPoints[1].Type.Value, Is.EqualTo(null));
+                Assert.That(third.ControlPoints[2].Position.Value, Is.EqualTo(new Vector2(224, 192)));
+                Assert.That(third.ControlPoints[2].Type.Value, Is.EqualTo(null));
+
+                Assert.That(third.ControlPoints[3].Position.Value, Is.EqualTo(new Vector2(224, 0)));
+                Assert.That(third.ControlPoints[3].Type.Value, Is.EqualTo(PathType.Bezier));
+                Assert.That(third.ControlPoints[4].Position.Value, Is.EqualTo(new Vector2(224, -192)));
+                Assert.That(third.ControlPoints[4].Type.Value, Is.EqualTo(null));
+                Assert.That(third.ControlPoints[5].Position.Value, Is.EqualTo(new Vector2(480, -192)));
+                Assert.That(third.ControlPoints[5].Type.Value, Is.EqualTo(null));
+                Assert.That(third.ControlPoints[6].Position.Value, Is.EqualTo(new Vector2(480, 0)));
+                Assert.That(third.ControlPoints[6].Type.Value, Is.EqualTo(null));
+            }
+        }
     }
 }

osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapEncoderTest.cs

@@ -30,7 +30,7 @@ namespace osu.Game.Tests.Beatmaps.Formats
     {
         private static readonly DllResourceStore beatmaps_resource_store = TestResources.GetStore();
 
-        private static IEnumerable<string> allBeatmaps = beatmaps_resource_store.GetAvailableResources().Where(res => res.EndsWith(".osu"));
+        private static IEnumerable<string> allBeatmaps = beatmaps_resource_store.GetAvailableResources().Where(res => res.EndsWith(".osu", StringComparison.Ordinal));
 
         [TestCaseSource(nameof(allBeatmaps))]
         public void TestEncodeDecodeStability(string name)

osu.Game.Tests/Editing/TransactionalCommitComponentTest.cs

@@ -0,0 +1,100 @@
+// 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 NUnit.Framework;
+using osu.Game.Screens.Edit;
+
+namespace osu.Game.Tests.Editing
+{
+    [TestFixture]
+    public class TransactionalCommitComponentTest
+    {
+        private TestHandler handler;
+
+        [SetUp]
+        public void SetUp()
+        {
+            handler = new TestHandler();
+        }
+
+        [Test]
+        public void TestCommitTransaction()
+        {
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(0));
+
+            handler.BeginChange();
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(0));
+            handler.EndChange();
+
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestSaveOutsideOfTransactionTriggersUpdates()
+        {
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(0));
+
+            handler.SaveState();
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(1));
+
+            handler.SaveState();
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(2));
+        }
+
+        [Test]
+        public void TestEventsFire()
+        {
+            int transactionBegan = 0;
+            int transactionEnded = 0;
+            int stateSaved = 0;
+
+            handler.TransactionBegan += () => transactionBegan++;
+            handler.TransactionEnded += () => transactionEnded++;
+            handler.SaveStateTriggered += () => stateSaved++;
+
+            handler.BeginChange();
+            Assert.That(transactionBegan, Is.EqualTo(1));
+
+            handler.EndChange();
+            Assert.That(transactionEnded, Is.EqualTo(1));
+
+            Assert.That(stateSaved, Is.EqualTo(0));
+            handler.SaveState();
+            Assert.That(stateSaved, Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestSaveDuringTransactionDoesntTriggerUpdate()
+        {
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(0));
+
+            handler.BeginChange();
+
+            handler.SaveState();
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(0));
+
+            handler.EndChange();
+
+            Assert.That(handler.StateUpdateCount, Is.EqualTo(1));
+        }
+
+        [Test]
+        public void TestEndWithoutBeginThrows()
+        {
+            handler.BeginChange();
+            handler.EndChange();
+            Assert.That(() => handler.EndChange(), Throws.TypeOf<InvalidOperationException>());
+        }
+
+        private class TestHandler : TransactionalCommitComponent
+        {
+            public int StateUpdateCount { get; private set; }
+
+            protected override void UpdateState()
+            {
+                StateUpdateCount++;
+            }
+        }
+    }
+}

osu.Game.Tests/NonVisual/DifficultyAdjustmentModCombinationsTest.cs

@@ -94,6 +94,52 @@ namespace osu.Game.Tests.NonVisual
             Assert.IsTrue(combinations[2] is ModIncompatibleWithAofA);
         }
 
+        [Test]
+        public void TestMultiModFlattening()
+        {
+            var combinations = new TestLegacyDifficultyCalculator(new ModA(), new MultiMod(new ModB(), new ModC())).CreateDifficultyAdjustmentModCombinations();
+
+            Assert.AreEqual(4, combinations.Length);
+            Assert.IsTrue(combinations[0] is ModNoMod);
+            Assert.IsTrue(combinations[1] is ModA);
+            Assert.IsTrue(combinations[2] is MultiMod);
+            Assert.IsTrue(combinations[3] is MultiMod);
+
+            Assert.IsTrue(((MultiMod)combinations[2]).Mods[0] is ModA);
+            Assert.IsTrue(((MultiMod)combinations[2]).Mods[1] is ModB);
+            Assert.IsTrue(((MultiMod)combinations[2]).Mods[2] is ModC);
+            Assert.IsTrue(((MultiMod)combinations[3]).Mods[0] is ModB);
+            Assert.IsTrue(((MultiMod)combinations[3]).Mods[1] is ModC);
+        }
+
+        [Test]
+        public void TestIncompatibleThroughMultiMod()
+        {
+            var combinations = new TestLegacyDifficultyCalculator(new ModA(), new MultiMod(new ModB(), new ModIncompatibleWithA())).CreateDifficultyAdjustmentModCombinations();
+
+            Assert.AreEqual(3, combinations.Length);
+            Assert.IsTrue(combinations[0] is ModNoMod);
+            Assert.IsTrue(combinations[1] is ModA);
+            Assert.IsTrue(combinations[2] is MultiMod);
+
+            Assert.IsTrue(((MultiMod)combinations[2]).Mods[0] is ModB);
+            Assert.IsTrue(((MultiMod)combinations[2]).Mods[1] is ModIncompatibleWithA);
+        }
+
+        [Test]
+        public void TestIncompatibleWithSameInstanceViaMultiMod()
+        {
+            var combinations = new TestLegacyDifficultyCalculator(new ModA(), new MultiMod(new ModA(), new ModB())).CreateDifficultyAdjustmentModCombinations();
+
+            Assert.AreEqual(3, combinations.Length);
+            Assert.IsTrue(combinations[0] is ModNoMod);
+            Assert.IsTrue(combinations[1] is ModA);
+            Assert.IsTrue(combinations[2] is MultiMod);
+
+            Assert.IsTrue(((MultiMod)combinations[2]).Mods[0] is ModA);
+            Assert.IsTrue(((MultiMod)combinations[2]).Mods[1] is ModB);
+        }
+
         private class ModA : Mod
         {
             public override string Name => nameof(ModA);
@@ -112,6 +158,13 @@ namespace osu.Game.Tests.NonVisual
             public override Type[] IncompatibleMods => new[] { typeof(ModIncompatibleWithAAndB) };
         }
 
+        private class ModC : Mod
+        {
+            public override string Name => nameof(ModC);
+            public override string Acronym => nameof(ModC);
+            public override double ScoreMultiplier => 1;
+        }
+
         private class ModIncompatibleWithA : Mod
         {
             public override string Name => $"Incompatible With {nameof(ModA)}";

osu.Game.Tests/NonVisual/Filtering/FilterMatchingTest.cs

@@ -197,5 +197,22 @@ namespace osu.Game.Tests.NonVisual.Filtering
             carouselItem.Filter(criteria);
             Assert.AreEqual(filtered, carouselItem.Filtered.Value);
         }
+
+        [TestCase("202010", true)]
+        [TestCase("20201010", false)]
+        [TestCase("153", true)]
+        [TestCase("1535", false)]
+        public void TestCriteriaMatchingBeatmapIDs(string query, bool filtered)
+        {
+            var beatmap = getExampleBeatmap();
+            beatmap.OnlineBeatmapID = 20201010;
+            beatmap.BeatmapSet = new BeatmapSetInfo { OnlineBeatmapSetID = 1535 };
+
+            var criteria = new FilterCriteria { SearchText = query };
+            var carouselItem = new CarouselBeatmap(beatmap);
+            carouselItem.Filter(criteria);
+
+            Assert.AreEqual(filtered, carouselItem.Filtered.Value);
+        }
     }
 }

osu.Game.Tests/Resources/multi-segment-slider.osu

@@ -0,0 +1,11 @@
+osu file format v128
+
+[HitObjects]
+// Multi-segment
+63,301,1000,6,0,P|224:57|B|439:298|131:316|322:169|155:194,1,1040,0|0,0:0|0:0,0:0:0:0:
+
+// Single-segment
+63,301,2000,6,0,P|224:57|439:298,1,1040,0|0,0:0|0:0,0:0:0:0:
+
+// Implicit multi-segment
+32,192,3000,6,0,B|32:384|256:384|256:192|256:192|256:0|512:0|512:192,1,800

osu.Game.Tests/Resources/old-skin/skin.ini

@@ -0,0 +1,2 @@
+[General]
+Version: 1.0

osu.Game.Tests/Visual/Background/TestSceneUserDimBackgrounds.cs

@@ -193,6 +193,7 @@ namespace osu.Game.Tests.Visual.Background
 
             AddStep("Transition to Results", () => player.Push(results = new FadeAccessibleResults(new ScoreInfo
             {
+                Ruleset = new OsuRuleset().RulesetInfo,
                 User = new User { Username = "osu!" },
                 Beatmap = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo
             })));

osu.Game.Tests/Visual/Editing/TestSceneTimelineTickDisplay.cs

@@ -5,7 +5,6 @@ using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Screens.Edit.Compose.Components;
-using osu.Game.Screens.Edit.Compose.Components.Timeline;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Editing
@@ -13,7 +12,7 @@ namespace osu.Game.Tests.Visual.Editing
     [TestFixture]
     public class TestSceneTimelineTickDisplay : TimelineTestScene
     {
-        public override Drawable CreateTestComponent() => new TimelineTickDisplay();
+        public override Drawable CreateTestComponent() => Empty(); // tick display is implicitly inside the timeline.
 
         [BackgroundDependencyLoader]
         private void load()

osu.Game.Tests/Visual/Editing/TestSceneWaveform.cs

@@ -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.Threading;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Audio;
@@ -76,7 +77,7 @@ namespace osu.Game.Tests.Visual.Editing
                 };
             });
 
-            AddUntilStep("wait for load", () => graph.ResampledWaveform != null);
+            AddUntilStep("wait for load", () => graph.Loaded.IsSet);
         }
 
         [Test]
@@ -98,12 +99,18 @@ namespace osu.Game.Tests.Visual.Editing
                 };
             });
 
-            AddUntilStep("wait for load", () => graph.ResampledWaveform != null);
+            AddUntilStep("wait for load", () => graph.Loaded.IsSet);
         }
 
         public class TestWaveformGraph : WaveformGraph
         {
-            public new Waveform ResampledWaveform => base.ResampledWaveform;
+            public readonly ManualResetEventSlim Loaded = new ManualResetEventSlim();
+
+            protected override void OnWaveformRegenerated(Waveform waveform)
+            {
+                base.OnWaveformRegenerated(waveform);
+                Loaded.Set();
+            }
         }
     }
 }

osu.Game.Tests/Visual/Gameplay/TestSceneComboCounter.cs

@@ -0,0 +1,47 @@
+// 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.Testing;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Screens.Play.HUD;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    public class TestSceneComboCounter : SkinnableTestScene
+    {
+        private IEnumerable<SkinnableComboCounter> comboCounters => CreatedDrawables.OfType<SkinnableComboCounter>();
+
+        protected override Ruleset CreateRulesetForSkinProvider() => new OsuRuleset();
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("Create combo counters", () => SetContents(() =>
+            {
+                var comboCounter = new SkinnableComboCounter();
+                comboCounter.Current.Value = 1;
+                return comboCounter;
+            }));
+        }
+
+        [Test]
+        public void TestComboCounterIncrementing()
+        {
+            AddRepeatStep("increase combo", () =>
+            {
+                foreach (var counter in comboCounters)
+                    counter.Current.Value++;
+            }, 10);
+
+            AddStep("reset combo", () =>
+            {
+                foreach (var counter in comboCounters)
+                    counter.Current.Value = 0;
+            });
+        }
+    }
+}

osu.Game.Tests/Visual/Gameplay/TestSceneGameplaySamplePlayback.cs

@@ -26,7 +26,7 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             AddStep("get variables", () =>
             {
-                gameplayClock = Player.ChildrenOfType<FrameStabilityContainer>().First().GameplayClock;
+                gameplayClock = Player.ChildrenOfType<FrameStabilityContainer>().First();
                 slider = Player.ChildrenOfType<DrawableSlider>().OrderBy(s => s.HitObject.StartTime).First();
                 samples = slider.ChildrenOfType<DrawableSample>().ToArray();
             });

osu.Game.Tests/Visual/Gameplay/TestSceneHUDOverlay.cs

@@ -2,23 +2,29 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Testing;
 using osu.Game.Configuration;
+using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Play;
 using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Gameplay
 {
-    public class TestSceneHUDOverlay : OsuManualInputManagerTestScene
+    public class TestSceneHUDOverlay : SkinnableTestScene
     {
         private HUDOverlay hudOverlay;
 
+        private IEnumerable<HUDOverlay> hudOverlays => CreatedDrawables.OfType<HUDOverlay>();
+
         // best way to check without exposing.
         private Drawable hideTarget => hudOverlay.KeyCounter;
         private FillFlowContainer<KeyCounter> keyCounterFlow => hudOverlay.KeyCounter.ChildrenOfType<FillFlowContainer<KeyCounter>>().First();
@@ -26,6 +32,24 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Resolved]
         private OsuConfigManager config { get; set; }
 
+        [Test]
+        public void TestComboCounterIncrementing()
+        {
+            createNew();
+
+            AddRepeatStep("increase combo", () =>
+            {
+                foreach (var hud in hudOverlays)
+                    hud.ComboCounter.Current.Value++;
+            }, 10);
+
+            AddStep("reset combo", () =>
+            {
+                foreach (var hud in hudOverlays)
+                    hud.ComboCounter.Current.Value = 0;
+            });
+        }
+
         [Test]
         public void TestShownByDefault()
         {
@@ -45,7 +69,7 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             createNew(h => h.OnLoadComplete += _ => initialAlpha = hideTarget.Alpha);
             AddUntilStep("wait for load", () => hudOverlay.IsAlive);
-            AddAssert("initial alpha was less than 1", () => initialAlpha != null && initialAlpha < 1);
+            AddAssert("initial alpha was less than 1", () => initialAlpha < 1);
         }
 
         [Test]
@@ -53,7 +77,7 @@ namespace osu.Game.Tests.Visual.Gameplay
         {
             createNew();
 
-            AddStep("set showhud false", () => hudOverlay.ShowHud.Value = false);
+            AddStep("set showhud false", () => hudOverlays.ForEach(h => h.ShowHud.Value = false));
 
             AddUntilStep("hidetarget is hidden", () => !hideTarget.IsPresent);
             AddAssert("pause button is still visible", () => hudOverlay.HoldToQuit.IsPresent);
@@ -89,14 +113,14 @@ namespace osu.Game.Tests.Visual.Gameplay
             AddStep("set keycounter visible false", () =>
             {
                 config.Set<bool>(OsuSetting.KeyOverlay, false);
-                hudOverlay.KeyCounter.AlwaysVisible.Value = false;
+                hudOverlays.ForEach(h => h.KeyCounter.AlwaysVisible.Value = false);
             });
 
-            AddStep("set showhud false", () => hudOverlay.ShowHud.Value = false);
+            AddStep("set showhud false", () => hudOverlays.ForEach(h => h.ShowHud.Value = false));
             AddUntilStep("hidetarget is hidden", () => !hideTarget.IsPresent);
             AddAssert("key counters hidden", () => !keyCounterFlow.IsPresent);
 
-            AddStep("set showhud true", () => hudOverlay.ShowHud.Value = true);
+            AddStep("set showhud true", () => hudOverlays.ForEach(h => h.ShowHud.Value = true));
             AddUntilStep("hidetarget is visible", () => hideTarget.IsPresent);
             AddAssert("key counters still hidden", () => !keyCounterFlow.IsPresent);
 
@@ -107,13 +131,22 @@ namespace osu.Game.Tests.Visual.Gameplay
         {
             AddStep("create overlay", () =>
             {
-                Child = hudOverlay = new HUDOverlay(null, null, null, Array.Empty<Mod>());
+                SetContents(() =>
+                {
+                    hudOverlay = new HUDOverlay(null, null, null, Array.Empty<Mod>());
 
-                // Add any key just to display the key counter visually.
-                hudOverlay.KeyCounter.Add(new KeyCounterKeyboard(Key.Space));
+                    // Add any key just to display the key counter visually.
+                    hudOverlay.KeyCounter.Add(new KeyCounterKeyboard(Key.Space));
 
-                action?.Invoke(hudOverlay);
+                    hudOverlay.ComboCounter.Current.Value = 1;
+
+                    action?.Invoke(hudOverlay);
+
+                    return hudOverlay;
+                });
             });
         }
+
+        protected override Ruleset CreateRulesetForSkinProvider() => new OsuRuleset();
     }
 }

osu.Game.Tests/Visual/Gameplay/TestSceneHitErrorMeter.cs

@@ -22,8 +22,10 @@ namespace osu.Game.Tests.Visual.Gameplay
     {
         private BarHitErrorMeter barMeter;
         private BarHitErrorMeter barMeter2;
+        private BarHitErrorMeter barMeter3;
         private ColourHitErrorMeter colourMeter;
         private ColourHitErrorMeter colourMeter2;
+        private ColourHitErrorMeter colourMeter3;
         private HitWindows hitWindows;
 
         public TestSceneHitErrorMeter()
@@ -115,6 +117,13 @@ namespace osu.Game.Tests.Visual.Gameplay
                 Origin = Anchor.CentreLeft,
             });
 
+            Add(barMeter3 = new BarHitErrorMeter(hitWindows, true)
+            {
+                Anchor = Anchor.BottomCentre,
+                Origin = Anchor.CentreLeft,
+                Rotation = 270,
+            });
+
             Add(colourMeter = new ColourHitErrorMeter(hitWindows)
             {
                 Anchor = Anchor.CentreRight,
@@ -128,6 +137,14 @@ namespace osu.Game.Tests.Visual.Gameplay
                 Origin = Anchor.CentreLeft,
                 Margin = new MarginPadding { Left = 50 }
             });
+
+            Add(colourMeter3 = new ColourHitErrorMeter(hitWindows)
+            {
+                Anchor = Anchor.BottomCentre,
+                Origin = Anchor.CentreLeft,
+                Rotation = 270,
+                Margin = new MarginPadding { Left = 50 }
+            });
         }
 
         private void newJudgement(double offset = 0)
@@ -140,8 +157,10 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             barMeter.OnNewJudgement(judgement);
             barMeter2.OnNewJudgement(judgement);
+            barMeter3.OnNewJudgement(judgement);
             colourMeter.OnNewJudgement(judgement);
             colourMeter2.OnNewJudgement(judgement);
+            colourMeter3.OnNewJudgement(judgement);
         }
     }
 }

osu.Game.Tests/Visual/Gameplay/TestSceneOverlayActivation.cs

@@ -3,6 +3,7 @@
 
 using System.Linq;
 using NUnit.Framework;
+using osu.Framework.Bindables;
 using osu.Game.Overlays;
 using osu.Game.Rulesets;
 
@@ -23,33 +24,41 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Test]
         public void TestGameplayOverlayActivation()
         {
+            AddAssert("local user playing", () => Player.LocalUserPlaying.Value);
             AddAssert("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
         }
 
         [Test]
         public void TestGameplayOverlayActivationPaused()
         {
+            AddAssert("local user playing", () => Player.LocalUserPlaying.Value);
             AddAssert("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
             AddStep("pause gameplay", () => Player.Pause());
+            AddAssert("local user not playing", () => !Player.LocalUserPlaying.Value);
             AddUntilStep("activation mode is user triggered", () => Player.OverlayActivationMode == OverlayActivation.UserTriggered);
         }
 
         [Test]
         public void TestGameplayOverlayActivationReplayLoaded()
         {
+            AddAssert("local user playing", () => Player.LocalUserPlaying.Value);
             AddAssert("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
             AddStep("load a replay", () => Player.DrawableRuleset.HasReplayLoaded.Value = true);
+            AddAssert("local user not playing", () => !Player.LocalUserPlaying.Value);
             AddAssert("activation mode is user triggered", () => Player.OverlayActivationMode == OverlayActivation.UserTriggered);
         }
 
         [Test]
         public void TestGameplayOverlayActivationBreaks()
         {
+            AddAssert("local user playing", () => Player.LocalUserPlaying.Value);
             AddAssert("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
             AddStep("seek to break", () => Player.GameplayClockContainer.Seek(Beatmap.Value.Beatmap.Breaks.First().StartTime));
             AddUntilStep("activation mode is user triggered", () => Player.OverlayActivationMode == OverlayActivation.UserTriggered);
+            AddAssert("local user not playing", () => !Player.LocalUserPlaying.Value);
             AddStep("seek to break end", () => Player.GameplayClockContainer.Seek(Beatmap.Value.Beatmap.Breaks.First().EndTime));
             AddUntilStep("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
+            AddAssert("local user playing", () => Player.LocalUserPlaying.Value);
         }
 
         protected override TestPlayer CreatePlayer(Ruleset ruleset) => new OverlayTestPlayer();
@@ -57,6 +66,7 @@ namespace osu.Game.Tests.Visual.Gameplay
         protected class OverlayTestPlayer : TestPlayer
         {
             public new OverlayActivation OverlayActivationMode => base.OverlayActivationMode.Value;
+            public new Bindable<bool> LocalUserPlaying => base.LocalUserPlaying;
         }
     }
 }

osu.Game.Tests/Visual/Gameplay/TestSceneScoreCounter.cs

@@ -1,68 +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 NUnit.Framework;
-using osu.Framework.Graphics;
-using osu.Game.Graphics.UserInterface;
-using osu.Game.Screens.Play.HUD;
-using osuTK;
-
-namespace osu.Game.Tests.Visual.Gameplay
-{
-    [TestFixture]
-    public class TestSceneScoreCounter : OsuTestScene
-    {
-        public TestSceneScoreCounter()
-        {
-            int numerator = 0, denominator = 0;
-
-            ScoreCounter score = new ScoreCounter(7)
-            {
-                Origin = Anchor.TopRight,
-                Anchor = Anchor.TopRight,
-                Margin = new MarginPadding(20),
-            };
-            Add(score);
-
-            ComboCounter comboCounter = new StandardComboCounter
-            {
-                Origin = Anchor.BottomLeft,
-                Anchor = Anchor.BottomLeft,
-                Margin = new MarginPadding(10),
-            };
-            Add(comboCounter);
-
-            PercentageCounter accuracyCounter = new PercentageCounter
-            {
-                Origin = Anchor.TopRight,
-                Anchor = Anchor.TopRight,
-                Position = new Vector2(-20, 60),
-            };
-            Add(accuracyCounter);
-
-            AddStep(@"Reset all", delegate
-            {
-                score.Current.Value = 0;
-                comboCounter.Current.Value = 0;
-                numerator = denominator = 0;
-                accuracyCounter.SetFraction(0, 0);
-            });
-
-            AddStep(@"Hit! :D", delegate
-            {
-                score.Current.Value += 300 + (ulong)(300.0 * (comboCounter.Current.Value > 0 ? comboCounter.Current.Value - 1 : 0) / 25.0);
-                comboCounter.Increment();
-                numerator++;
-                denominator++;
-                accuracyCounter.SetFraction(numerator, denominator);
-            });
-
-            AddStep(@"miss...", delegate
-            {
-                comboCounter.Current.Value = 0;
-                denominator++;
-                accuracyCounter.SetFraction(numerator, denominator);
-            });
-        }
-    }
-}

osu.Game.Tests/Visual/Gameplay/TestSceneSkinnableAccuracyCounter.cs

@@ -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.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Testing;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Screens.Play.HUD;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    public class TestSceneSkinnableAccuracyCounter : SkinnableTestScene
+    {
+        private IEnumerable<SkinnableAccuracyCounter> accuracyCounters => CreatedDrawables.OfType<SkinnableAccuracyCounter>();
+
+        protected override Ruleset CreateRulesetForSkinProvider() => new OsuRuleset();
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("Create combo counters", () => SetContents(() =>
+            {
+                var accuracyCounter = new SkinnableAccuracyCounter();
+
+                accuracyCounter.Current.Value = 1;
+
+                return accuracyCounter;
+            }));
+        }
+
+        [Test]
+        public void TestChangingAccuracy()
+        {
+            AddStep(@"Reset all", delegate
+            {
+                foreach (var s in accuracyCounters)
+                    s.Current.Value = 1;
+            });
+
+            AddStep(@"Hit! :D", delegate
+            {
+                foreach (var s in accuracyCounters)
+                    s.Current.Value -= 0.023f;
+            });
+        }
+    }
+}

osu.Game.Tests/Visual/Gameplay/TestSceneSkinnableHealthDisplay.cs

@@ -0,0 +1,61 @@
+// 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.Testing;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Rulesets.Osu.Judgements;
+using osu.Game.Screens.Play;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    public class TestSceneSkinnableHealthDisplay : SkinnableTestScene
+    {
+        private IEnumerable<SkinnableHealthDisplay> healthDisplays => CreatedDrawables.OfType<SkinnableHealthDisplay>();
+
+        protected override Ruleset CreateRulesetForSkinProvider() => new OsuRuleset();
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("Create health displays", () =>
+            {
+                SetContents(() => new SkinnableHealthDisplay());
+            });
+            AddStep(@"Reset all", delegate
+            {
+                foreach (var s in healthDisplays)
+                    s.Current.Value = 1;
+            });
+        }
+
+        [Test]
+        public void TestHealthDisplayIncrementing()
+        {
+            AddRepeatStep(@"decrease hp", delegate
+            {
+                foreach (var healthDisplay in healthDisplays)
+                    healthDisplay.Current.Value -= 0.08f;
+            }, 10);
+
+            AddRepeatStep(@"increase hp without flash", delegate
+            {
+                foreach (var healthDisplay in healthDisplays)
+                    healthDisplay.Current.Value += 0.1f;
+            }, 3);
+
+            AddRepeatStep(@"increase hp with flash", delegate
+            {
+                foreach (var healthDisplay in healthDisplays)
+                {
+                    healthDisplay.Current.Value += 0.1f;
+                    healthDisplay.Flash(new JudgementResult(null, new OsuJudgement()));
+                }
+            }, 3);
+        }
+    }
+}

osu.Game.Tests/Visual/Gameplay/TestSceneSkinnableScoreCounter.cs

@@ -0,0 +1,54 @@
+// 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.Extensions.IEnumerableExtensions;
+using osu.Framework.Testing;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Screens.Play.HUD;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    public class TestSceneSkinnableScoreCounter : SkinnableTestScene
+    {
+        private IEnumerable<SkinnableScoreCounter> scoreCounters => CreatedDrawables.OfType<SkinnableScoreCounter>();
+
+        protected override Ruleset CreateRulesetForSkinProvider() => new OsuRuleset();
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("Create combo counters", () => SetContents(() =>
+            {
+                var comboCounter = new SkinnableScoreCounter();
+                comboCounter.Current.Value = 1;
+                return comboCounter;
+            }));
+        }
+
+        [Test]
+        public void TestScoreCounterIncrementing()
+        {
+            AddStep(@"Reset all", delegate
+            {
+                foreach (var s in scoreCounters)
+                    s.Current.Value = 0;
+            });
+
+            AddStep(@"Hit! :D", delegate
+            {
+                foreach (var s in scoreCounters)
+                    s.Current.Value += 300;
+            });
+        }
+
+        [Test]
+        public void TestVeryLargeScore()
+        {
+            AddStep("set large score", () => scoreCounters.ForEach(counter => counter.Current.Value = 1_000_000_000));
+        }
+    }
+}

osu.Game.Tests/Visual/Gameplay/TestSceneSkinnableSound.cs

@@ -13,7 +13,6 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.OpenGL.Textures;
 using osu.Framework.Graphics.Textures;
 using osu.Framework.Testing;
-using osu.Framework.Timing;
 using osu.Game.Audio;
 using osu.Game.Screens.Play;
 using osu.Game.Skinning;
@@ -22,27 +21,24 @@ namespace osu.Game.Tests.Visual.Gameplay
 {
     public class TestSceneSkinnableSound : OsuTestScene
     {
-        [Cached(typeof(ISamplePlaybackDisabler))]
-        private GameplayClock gameplayClock = new GameplayClock(new FramedClock());
-
         private TestSkinSourceContainer skinSource;
         private PausableSkinnableSound skinnableSound;
 
         [SetUp]
-        public void SetUp() => Schedule(() =>
+        public void SetUpSteps()
         {
-            gameplayClock.IsPaused.Value = false;
-
-            Children = new Drawable[]
+            AddStep("setup hierarchy", () =>
             {
-                skinSource = new TestSkinSourceContainer
+                Children = new Drawable[]
                 {
-                    Clock = gameplayClock,
-                    RelativeSizeAxes = Axes.Both,
-                    Child = skinnableSound = new PausableSkinnableSound(new SampleInfo("normal-sliderslide"))
-                },
-            };
-        });
+                    skinSource = new TestSkinSourceContainer
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Child = skinnableSound = new PausableSkinnableSound(new SampleInfo("normal-sliderslide"))
+                    },
+                };
+            });
+        }
 
         [Test]
         public void TestStoppedSoundDoesntResumeAfterPause()
@@ -62,8 +58,9 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             AddUntilStep("wait for sample to stop playing", () => !sample.Playing);
 
-            AddStep("pause gameplay clock", () => gameplayClock.IsPaused.Value = true);
-            AddStep("resume gameplay clock", () => gameplayClock.IsPaused.Value = false);
+            AddStep("disable sample playback", () => skinSource.SamplePlaybackDisabled.Value = true);
+
+            AddStep("enable sample playback", () => skinSource.SamplePlaybackDisabled.Value = false);
 
             AddWaitStep("wait a bit", 5);
             AddAssert("sample not playing", () => !sample.Playing);
@@ -82,8 +79,11 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             AddUntilStep("wait for sample to start playing", () => sample.Playing);
 
-            AddStep("pause gameplay clock", () => gameplayClock.IsPaused.Value = true);
+            AddStep("disable sample playback", () => skinSource.SamplePlaybackDisabled.Value = true);
             AddUntilStep("wait for sample to stop playing", () => !sample.Playing);
+
+            AddStep("enable sample playback", () => skinSource.SamplePlaybackDisabled.Value = false);
+            AddUntilStep("wait for sample to start playing", () => sample.Playing);
         }
 
         [Test]
@@ -98,10 +98,11 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             AddAssert("sample playing", () => sample.Playing);
 
-            AddStep("pause gameplay clock", () => gameplayClock.IsPaused.Value = true);
-            AddUntilStep("wait for sample to stop playing", () => !sample.Playing);
+            AddStep("disable sample playback", () => skinSource.SamplePlaybackDisabled.Value = true);
 
-            AddStep("resume gameplay clock", () => gameplayClock.IsPaused.Value = false);
+            AddUntilStep("sample not playing", () => !sample.Playing);
+
+            AddStep("enable sample playback", () => skinSource.SamplePlaybackDisabled.Value = false);
 
             AddAssert("sample not playing", () => !sample.Playing);
             AddAssert("sample not playing", () => !sample.Playing);
@@ -120,7 +121,7 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             AddAssert("sample playing", () => sample.Playing);
 
-            AddStep("pause gameplay clock", () => gameplayClock.IsPaused.Value = true);
+            AddStep("disable sample playback", () => skinSource.SamplePlaybackDisabled.Value = true);
             AddUntilStep("wait for sample to stop playing", () => !sample.Playing);
 
             AddStep("trigger skin change", () => skinSource.TriggerSourceChanged());
@@ -133,20 +134,25 @@ namespace osu.Game.Tests.Visual.Gameplay
             });
 
             AddAssert("new sample stopped", () => !sample.Playing);
-            AddStep("resume gameplay clock", () => gameplayClock.IsPaused.Value = false);
+            AddStep("enable sample playback", () => skinSource.SamplePlaybackDisabled.Value = false);
 
             AddWaitStep("wait a bit", 5);
             AddAssert("new sample not played", () => !sample.Playing);
         }
 
         [Cached(typeof(ISkinSource))]
-        private class TestSkinSourceContainer : Container, ISkinSource
+        [Cached(typeof(ISamplePlaybackDisabler))]
+        private class TestSkinSourceContainer : Container, ISkinSource, ISamplePlaybackDisabler
         {
             [Resolved]
             private ISkinSource source { get; set; }
 
             public event Action SourceChanged;
 
+            public Bindable<bool> SamplePlaybackDisabled { get; } = new Bindable<bool>();
+
+            IBindable<bool> ISamplePlaybackDisabler.SamplePlaybackDisabled => SamplePlaybackDisabled;
+
             public Drawable GetDrawableComponent(ISkinComponent component) => source?.GetDrawableComponent(component);
             public Texture GetTexture(string componentName, WrapMode wrapModeS, WrapMode wrapModeT) => source?.GetTexture(componentName, wrapModeS, wrapModeT);
             public SampleChannel GetSample(ISampleInfo sampleInfo) => source?.GetSample(sampleInfo);

osu.Game.Tests/Visual/Ranking/TestSceneHitEventTimingDistributionGraph.cs

@@ -23,6 +23,12 @@ namespace osu.Game.Tests.Visual.Ranking
             createTest(CreateDistributedHitEvents());
         }
 
+        [Test]
+        public void TestAroundCentre()
+        {
+            createTest(Enumerable.Range(-150, 300).Select(i => new HitEvent(i / 50f, HitResult.Perfect, new HitCircle(), new HitCircle(), null)).ToList());
+        }
+
         [Test]
         public void TestZeroTimeOffset()
         {

osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapCarousel.cs

@@ -394,7 +394,7 @@ namespace osu.Game.Tests.Visual.SongSelect
             AddStep("Sort by author", () => carousel.Filter(new FilterCriteria { Sort = SortMode.Author }, false));
             AddAssert("Check zzzzz is at bottom", () => carousel.BeatmapSets.Last().Metadata.AuthorString == "zzzzz");
             AddStep("Sort by artist", () => carousel.Filter(new FilterCriteria { Sort = SortMode.Artist }, false));
-            AddAssert($"Check #{set_count} is at bottom", () => carousel.BeatmapSets.Last().Metadata.Title.EndsWith($"#{set_count}!"));
+            AddAssert($"Check #{set_count} is at bottom", () => carousel.BeatmapSets.Last().Metadata.Title.EndsWith($"#{set_count}!", StringComparison.Ordinal));
         }
 
         [Test]

osu.Game.Tests/Visual/UserInterface/TestSceneModSettings.cs

@@ -9,6 +9,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Utils;
+using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Configuration;
 using osu.Game.Graphics.UserInterface;
@@ -18,10 +19,11 @@ using osu.Game.Rulesets.Difficulty;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.UI;
+using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.UserInterface
 {
-    public class TestSceneModSettings : OsuTestScene
+    public class TestSceneModSettings : OsuManualInputManagerTestScene
     {
         private TestModSelectOverlay modSelect;
 
@@ -95,6 +97,41 @@ namespace osu.Game.Tests.Visual.UserInterface
             AddAssert("copy has original value", () => Precision.AlmostEquals(1.5, copy.SpeedChange.Value));
         }
 
+        [Test]
+        public void TestMultiModSettingsUnboundWhenCopied()
+        {
+            MultiMod original = null;
+            MultiMod copy = null;
+
+            AddStep("create mods", () =>
+            {
+                original = new MultiMod(new OsuModDoubleTime());
+                copy = (MultiMod)original.CreateCopy();
+            });
+
+            AddStep("change property", () => ((OsuModDoubleTime)original.Mods[0]).SpeedChange.Value = 2);
+
+            AddAssert("original has new value", () => Precision.AlmostEquals(2.0, ((OsuModDoubleTime)original.Mods[0]).SpeedChange.Value));
+            AddAssert("copy has original value", () => Precision.AlmostEquals(1.5, ((OsuModDoubleTime)copy.Mods[0]).SpeedChange.Value));
+        }
+
+        [Test]
+        public void TestCustomisationMenuNoClickthrough()
+        {
+            createModSelect();
+            openModSelect();
+
+            AddStep("change mod settings menu width to full screen", () => modSelect.SetModSettingsWidth(1.0f));
+            AddStep("select cm2", () => modSelect.SelectMod(testCustomisableAutoOpenMod));
+            AddAssert("Customisation opened", () => modSelect.ModSettingsContainer.Alpha == 1);
+            AddStep("hover over mod behind settings menu", () => InputManager.MoveMouseTo(modSelect.GetModButton(testCustomisableMod)));
+            AddAssert("Mod is not considered hovered over", () => !modSelect.GetModButton(testCustomisableMod).IsHovered);
+            AddStep("left click mod", () => InputManager.Click(MouseButton.Left));
+            AddAssert("only cm2 is active", () => SelectedMods.Value.Count == 1);
+            AddStep("right click mod", () => InputManager.Click(MouseButton.Right));
+            AddAssert("only cm2 is active", () => SelectedMods.Value.Count == 1);
+        }
+
         private void createModSelect()
         {
             AddStep("create mod select", () =>
@@ -121,9 +158,16 @@ namespace osu.Game.Tests.Visual.UserInterface
 
             public bool ButtonsLoaded => ModSectionsContainer.Children.All(c => c.ModIconsLoaded);
 
+            public ModButton GetModButton(Mod mod)
+            {
+                return ModSectionsContainer.ChildrenOfType<ModButton>().Single(b => b.Mods.Any(m => m.GetType() == mod.GetType()));
+            }
+
             public void SelectMod(Mod mod) =>
-                ModSectionsContainer.Children.Single(s => s.ModType == mod.Type)
-                                    .ButtonsContainer.OfType<ModButton>().Single(b => b.Mods.Any(m => m.GetType() == mod.GetType())).SelectNext(1);
+                GetModButton(mod).SelectNext(1);
+
+            public void SetModSettingsWidth(float newWidth) =>
+                ModSettingsContainer.Width = newWidth;
         }
 
         public class TestRulesetInfo : RulesetInfo

osu.Game.Tests/WaveformTestBeatmap.cs

@@ -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.IO;
 using System.Linq;
 using osu.Framework.Audio;
@@ -59,7 +60,7 @@ namespace osu.Game.Tests
             get
             {
                 using (var reader = getZipReader())
-                    return reader.Filenames.First(f => f.EndsWith(".mp3"));
+                    return reader.Filenames.First(f => f.EndsWith(".mp3", StringComparison.Ordinal));
             }
         }
 
@@ -73,7 +74,7 @@ namespace osu.Game.Tests
             protected override Beatmap CreateBeatmap()
             {
                 using (var reader = getZipReader())
-                using (var beatmapStream = reader.GetStream(reader.Filenames.First(f => f.EndsWith(".osu"))))
+                using (var beatmapStream = reader.GetStream(reader.Filenames.First(f => f.EndsWith(".osu", StringComparison.Ordinal))))
                 using (var beatmapReader = new LineBufferedReader(beatmapStream))
                     return Decoder.GetDecoder<Beatmap>(beatmapReader).Decode(beatmapReader);
             }

osu.Game.Tournament/Screens/Drawings/DrawingsScreen.cs

@@ -234,7 +234,7 @@ namespace osu.Game.Tournament.Screens.Drawings
                             if (string.IsNullOrEmpty(line))
                                 continue;
 
-                            if (line.ToUpperInvariant().StartsWith("GROUP"))
+                            if (line.ToUpperInvariant().StartsWith("GROUP", StringComparison.Ordinal))
                                 continue;
 
                             // ReSharper disable once AccessToModifiedClosure

osu.Game/Beatmaps/BeatmapDifficultyManager.cs

@@ -13,9 +13,12 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Lists;
+using osu.Framework.Logging;
 using osu.Framework.Threading;
+using osu.Framework.Utils;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Beatmaps
 {
@@ -124,13 +127,22 @@ namespace osu.Game.Beatmaps
         /// <returns>The <see cref="DifficultyRating"/> that best describes <paramref name="starRating"/>.</returns>
         public static DifficultyRating GetDifficultyRating(double starRating)
         {
-            if (starRating < 2.0) return DifficultyRating.Easy;
-            if (starRating < 2.7) return DifficultyRating.Normal;
-            if (starRating < 4.0) return DifficultyRating.Hard;
-            if (starRating < 5.3) return DifficultyRating.Insane;
-            if (starRating < 6.5) return DifficultyRating.Expert;
+            if (Precision.AlmostBigger(starRating, 6.5, 0.005))
+                return DifficultyRating.ExpertPlus;
 
-            return DifficultyRating.ExpertPlus;
+            if (Precision.AlmostBigger(starRating, 5.3, 0.005))
+                return DifficultyRating.Expert;
+
+            if (Precision.AlmostBigger(starRating, 4.0, 0.005))
+                return DifficultyRating.Insane;
+
+            if (Precision.AlmostBigger(starRating, 2.7, 0.005))
+                return DifficultyRating.Hard;
+
+            if (Precision.AlmostBigger(starRating, 2.0, 0.005))
+                return DifficultyRating.Normal;
+
+            return DifficultyRating.Easy;
         }
 
         private CancellationTokenSource trackedUpdateCancellationSource;
@@ -228,6 +240,24 @@ namespace osu.Game.Beatmaps
 
                 return difficultyCache[key] = new StarDifficulty(attributes.StarRating, attributes.MaxCombo);
             }
+            catch (BeatmapInvalidForRulesetException e)
+            {
+                // Conversion has failed for the given ruleset, so return the difficulty in the beatmap's default ruleset.
+
+                // Ensure the beatmap's default ruleset isn't the one already being converted to.
+                // This shouldn't happen as it means something went seriously wrong, but if it does an endless loop should be avoided.
+                if (rulesetInfo.Equals(beatmapInfo.Ruleset))
+                {
+                    Logger.Error(e, $"Failed to convert {beatmapInfo.OnlineBeatmapID} to the beatmap's default ruleset ({beatmapInfo.Ruleset}).");
+                    return difficultyCache[key] = new StarDifficulty();
+                }
+
+                // Check the cache first because this is now a different ruleset than the one previously guarded against.
+                if (tryGetExisting(beatmapInfo, beatmapInfo.Ruleset, Array.Empty<Mod>(), out var existingDefault, out var existingDefaultKey))
+                    return existingDefault;
+
+                return computeDifficulty(existingDefaultKey, beatmapInfo, beatmapInfo.Ruleset);
+            }
             catch
             {
                 return difficultyCache[key] = new StarDifficulty();

osu.Game/Beatmaps/BeatmapInfo.cs

@@ -98,7 +98,7 @@ namespace osu.Game.Beatmaps
         [JsonIgnore]
         public string StoredBookmarks
         {
-            get => string.Join(",", Bookmarks);
+            get => string.Join(',', Bookmarks);
             set
             {
                 if (string.IsNullOrEmpty(value))

osu.Game/Beatmaps/BeatmapManager.cs

@@ -19,6 +19,7 @@ using osu.Framework.Graphics.Textures;
 using osu.Framework.Lists;
 using osu.Framework.Logging;
 using osu.Framework.Platform;
+using osu.Framework.Testing;
 using osu.Game.Beatmaps.Formats;
 using osu.Game.Database;
 using osu.Game.IO;
@@ -36,6 +37,7 @@ namespace osu.Game.Beatmaps
     /// <summary>
     /// Handles the storage and retrieval of Beatmaps/WorkingBeatmaps.
     /// </summary>
+    [ExcludeFromDynamicCompile]
     public partial class BeatmapManager : DownloadableArchiveModelManager<BeatmapSetInfo, BeatmapSetFileInfo>, IDisposable
     {
         /// <summary>
@@ -389,7 +391,7 @@ namespace osu.Game.Beatmaps
         protected override BeatmapSetInfo CreateModel(ArchiveReader reader)
         {
             // let's make sure there are actually .osu files to import.
-            string mapName = reader.Filenames.FirstOrDefault(f => f.EndsWith(".osu"));
+            string mapName = reader.Filenames.FirstOrDefault(f => f.EndsWith(".osu", StringComparison.OrdinalIgnoreCase));
 
             if (string.IsNullOrEmpty(mapName))
             {
@@ -417,7 +419,7 @@ namespace osu.Game.Beatmaps
         {
             var beatmapInfos = new List<BeatmapInfo>();
 
-            foreach (var file in files.Where(f => f.Filename.EndsWith(".osu")))
+            foreach (var file in files.Where(f => f.Filename.EndsWith(".osu", StringComparison.OrdinalIgnoreCase)))
             {
                 using (var raw = Files.Store.GetStream(file.FileInfo.StoragePath))
                 using (var ms = new MemoryStream()) // we need a memory stream so we can seek

osu.Game/Beatmaps/BeatmapManager_BeatmapOnlineLookupQueue.cs

@@ -13,6 +13,7 @@ using osu.Framework.Development;
 using osu.Framework.IO.Network;
 using osu.Framework.Logging;
 using osu.Framework.Platform;
+using osu.Framework.Testing;
 using osu.Framework.Threading;
 using osu.Game.Online.API;
 using osu.Game.Online.API.Requests;
@@ -23,6 +24,7 @@ namespace osu.Game.Beatmaps
 {
     public partial class BeatmapManager
     {
+        [ExcludeFromDynamicCompile]
         private class BeatmapOnlineLookupQueue : IDisposable
         {
             private readonly IAPIProvider api;

osu.Game/Beatmaps/BeatmapManager_WorkingBeatmap.cs

@@ -8,6 +8,7 @@ using osu.Framework.Audio.Track;
 using osu.Framework.Graphics.Textures;
 using osu.Framework.IO.Stores;
 using osu.Framework.Logging;
+using osu.Framework.Testing;
 using osu.Game.Beatmaps.Formats;
 using osu.Game.IO;
 using osu.Game.Skinning;
@@ -17,6 +18,7 @@ namespace osu.Game.Beatmaps
 {
     public partial class BeatmapManager
     {
+        [ExcludeFromDynamicCompile]
         private class BeatmapManagerWorkingBeatmap : WorkingBeatmap
         {
             private readonly IResourceStore<byte[]> store;

osu.Game/Beatmaps/BeatmapSetInfo.cs

@@ -57,7 +57,7 @@ namespace osu.Game.Beatmaps
 
         public string Hash { get; set; }
 
-        public string StoryboardFile => Files?.Find(f => f.Filename.EndsWith(".osb"))?.Filename;
+        public string StoryboardFile => Files?.Find(f => f.Filename.EndsWith(".osb", StringComparison.OrdinalIgnoreCase))?.Filename;
 
         public List<BeatmapSetFileInfo> Files { get; set; }
 

osu.Game/Beatmaps/Formats/LegacyBeatmapDecoder.cs

@@ -307,12 +307,7 @@ namespace osu.Game.Beatmaps.Formats
                     double start = getOffsetTime(Parsing.ParseDouble(split[1]));
                     double end = Math.Max(start, getOffsetTime(Parsing.ParseDouble(split[2])));
 
-                    var breakEvent = new BreakPeriod(start, end);
-
-                    if (!breakEvent.HasEffect)
-                        return;
-
-                    beatmap.Breaks.Add(breakEvent);
+                    beatmap.Breaks.Add(new BreakPeriod(start, end));
                     break;
             }
         }

osu.Game/Beatmaps/Formats/LegacyDecoder.cs

@@ -92,7 +92,7 @@ namespace osu.Game.Beatmaps.Formats
         {
             var pair = SplitKeyVal(line);
 
-            bool isCombo = pair.Key.StartsWith(@"Combo");
+            bool isCombo = pair.Key.StartsWith(@"Combo", StringComparison.Ordinal);
 
             string[] split = pair.Value.Split(',');
 

osu.Game/Beatmaps/Timing/BreakPeriod.cs

@@ -28,7 +28,7 @@ namespace osu.Game.Beatmaps.Timing
         public double Duration => EndTime - StartTime;
 
         /// <summary>
-        /// Whether the break has any effect. Breaks that are too short are culled before they are added to the beatmap.
+        /// Whether the break has any effect.
         /// </summary>
         public bool HasEffect => Duration >= MIN_BREAK_DURATION;
 

osu.Game/Configuration/OsuConfigManager.cs

@@ -7,6 +7,7 @@ using osu.Framework.Configuration.Tracking;
 using osu.Framework.Extensions;
 using osu.Framework.Platform;
 using osu.Framework.Testing;
+using osu.Game.Input;
 using osu.Game.Overlays;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Screens.Select;
@@ -69,6 +70,7 @@ namespace osu.Game.Configuration
 
             Set(OsuSetting.MouseDisableButtons, false);
             Set(OsuSetting.MouseDisableWheel, false);
+            Set(OsuSetting.ConfineMouseMode, OsuConfineMouseMode.DuringGameplay);
 
             // Graphics
             Set(OsuSetting.ShowFpsDisplay, false);
@@ -194,6 +196,7 @@ namespace osu.Game.Configuration
         FadePlayfieldWhenHealthLow,
         MouseDisableButtons,
         MouseDisableWheel,
+        ConfineMouseMode,
         AudioOffset,
         VolumeInactive,
         MenuMusic,

osu.Game/Configuration/ScoreMeterType.cs

@@ -16,7 +16,10 @@ namespace osu.Game.Configuration
         [Description("Hit Error (right)")]
         HitErrorRight,
 
-        [Description("Hit Error (both)")]
+        [Description("Hit Error (bottom)")]
+        HitErrorBottom,
+
+        [Description("Hit Error (left+right)")]
         HitErrorBoth,
 
         [Description("Colour (left)")]
@@ -25,7 +28,10 @@ namespace osu.Game.Configuration
         [Description("Colour (right)")]
         ColourRight,
 
-        [Description("Colour (both)")]
+        [Description("Colour (left+right)")]
         ColourBoth,
+
+        [Description("Colour (bottom)")]
+        ColourBottom,
     }
 }

osu.Game/Database/ArchiveModelManager.cs

@@ -279,7 +279,7 @@ namespace osu.Game.Database
             // for now, concatenate all .osu files in the set to create a unique hash.
             MemoryStream hashable = new MemoryStream();
 
-            foreach (TFileModel file in item.Files.Where(f => HashableFileTypes.Any(f.Filename.EndsWith)).OrderBy(f => f.Filename))
+            foreach (TFileModel file in item.Files.Where(f => HashableFileTypes.Any(ext => f.Filename.EndsWith(ext, StringComparison.OrdinalIgnoreCase))).OrderBy(f => f.Filename))
             {
                 using (Stream s = Files.Store.GetStream(file.FileInfo.StoragePath))
                     s.CopyTo(hashable);
@@ -593,7 +593,7 @@ namespace osu.Game.Database
             var fileInfos = new List<TFileModel>();
 
             string prefix = reader.Filenames.GetCommonPrefix();
-            if (!(prefix.EndsWith("/") || prefix.EndsWith("\\")))
+            if (!(prefix.EndsWith('/') || prefix.EndsWith('\\')))
                 prefix = string.Empty;
 
             // import files to manager

osu.Game/Graphics/UserInterface/PercentageCounter.cs

@@ -2,7 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Utils;
@@ -28,9 +27,6 @@ namespace osu.Game.Graphics.UserInterface
             Current.Value = DisplayedCount = 1.0f;
         }
 
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours) => Colour = colours.BlueLighter;
-
         protected override string FormatCount(double count) => count.FormatAccuracy();
 
         protected override double GetProportionalDuration(double currentValue, double newValue)

osu.Game/Graphics/UserInterface/ScoreCounter.cs

@@ -1,18 +1,21 @@
 // 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.Graphics;
 using osu.Game.Graphics.Sprites;
+using osu.Game.Screens.Play.HUD;
 
 namespace osu.Game.Graphics.UserInterface
 {
-    public class ScoreCounter : RollingCounter<double>
+    public abstract class ScoreCounter : RollingCounter<double>, IScoreCounter
     {
         protected override double RollingDuration => 1000;
         protected override Easing RollingEasing => Easing.Out;
 
-        public bool UseCommaSeparator;
+        /// <summary>
+        /// Whether comma separators should be displayed.
+        /// </summary>
+        public bool UseCommaSeparator { get; }
 
         /// <summary>
         /// How many leading zeroes the counter has.
@@ -23,14 +26,13 @@ namespace osu.Game.Graphics.UserInterface
         /// Displays score.
         /// </summary>
         /// <param name="leading">How many leading zeroes the counter will have.</param>
-        public ScoreCounter(uint leading = 0)
+        /// <param name="useCommaSeparator">Whether comma separators should be displayed.</param>
+        protected ScoreCounter(uint leading = 0, bool useCommaSeparator = false)
         {
+            UseCommaSeparator = useCommaSeparator;
             LeadingZeroes = leading;
         }
 
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours) => Colour = colours.BlueLighter;
-
         protected override double GetProportionalDuration(double currentValue, double newValue)
         {
             return currentValue > newValue ? currentValue - newValue : newValue - currentValue;