Merge branch 'master' into spectator-reliability

Directory.Build.props

@@ -18,7 +18,6 @@
   <ItemGroup Label="Code Analysis">
     <PackageReference Include="Microsoft.CodeAnalysis.BannedApiAnalyzers" Version="3.3.3" PrivateAssets="All" />
     <AdditionalFiles Include="$(MSBuildThisFileDirectory)CodeAnalysis\BannedSymbols.txt" />
-    <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="6.0.0" PrivateAssets="All" />
   </ItemGroup>
   <PropertyGroup Label="Code Analysis">
     <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)CodeAnalysis\osu.ruleset</CodeAnalysisRuleSet>

osu.Android.props

@@ -52,7 +52,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="ppy.osu.Game.Resources" Version="2022.211.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2022.217.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2022.223.0" />
   </ItemGroup>
   <ItemGroup Label="Transitive Dependencies">
     <!-- Realm needs to be directly referenced in all Xamarin projects, as it will not pull in its transitive dependencies otherwise. -->

osu.Desktop/LegacyIpc/LegacyTcpIpcProvider.cs

@@ -77,10 +77,9 @@ namespace osu.Desktop.LegacyIpc
                 case LegacyIpcDifficultyCalculationRequest req:
                     try
                     {
-                        var ruleset = getLegacyRulesetFromID(req.RulesetId);
-
+                        WorkingBeatmap beatmap = new FlatFileWorkingBeatmap(req.BeatmapFile);
+                        var ruleset = beatmap.BeatmapInfo.Ruleset.CreateInstance();
                         Mod[] mods = ruleset.ConvertFromLegacyMods((LegacyMods)req.Mods).ToArray();
-                        WorkingBeatmap beatmap = new FlatFileWorkingBeatmap(req.BeatmapFile, _ => ruleset);
 
                         return new LegacyIpcDifficultyCalculationResponse
                         {

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModSpunOut.cs

@@ -8,12 +8,15 @@ using NUnit.Framework;
 using osu.Framework.Testing;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Judgements;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Skinning.Default;
+using osu.Game.Rulesets.Scoring;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Tests.Mods
@@ -23,13 +26,37 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
         protected override bool AllowFail => true;
 
         [Test]
-        public void TestSpinnerAutoCompleted() => CreateModTest(new ModTestData
+        public void TestSpinnerAutoCompleted()
         {
-            Mod = new OsuModSpunOut(),
-            Autoplay = false,
-            Beatmap = singleSpinnerBeatmap,
-            PassCondition = () => Player.ChildrenOfType<DrawableSpinner>().SingleOrDefault()?.Progress >= 1
-        });
+            DrawableSpinner spinner = null;
+            JudgementResult lastResult = null;
+
+            CreateModTest(new ModTestData
+            {
+                Mod = new OsuModSpunOut(),
+                Autoplay = false,
+                Beatmap = singleSpinnerBeatmap,
+                PassCondition = () =>
+                {
+                    // Bind to the first spinner's results for further tracking.
+                    if (spinner == null)
+                    {
+                        // We only care about the first spinner we encounter for this test.
+                        var nextSpinner = Player.ChildrenOfType<DrawableSpinner>().SingleOrDefault();
+
+                        if (nextSpinner == null)
+                            return false;
+
+                        lastResult = null;
+
+                        spinner = nextSpinner;
+                        spinner.OnNewResult += (o, result) => lastResult = result;
+                    }
+
+                    return lastResult?.Type == HitResult.Great;
+                }
+            });
+        }
 
         [TestCase(null)]
         [TestCase(typeof(OsuModDoubleTime))]
@@ -48,7 +75,57 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
                 PassCondition = () =>
                 {
                     var counter = Player.ChildrenOfType<SpinnerSpmCalculator>().SingleOrDefault();
-                    return counter != null && Precision.AlmostEquals(counter.Result.Value, 286, 1);
+                    var spinner = Player.ChildrenOfType<DrawableSpinner>().FirstOrDefault();
+
+                    if (counter == null || spinner == null)
+                        return false;
+
+                    // ignore cases where the spinner hasn't started as these lead to false-positives
+                    if (Precision.AlmostEquals(counter.Result.Value, 0, 1))
+                        return false;
+
+                    float rotationSpeed = (float)(1.01 * spinner.HitObject.SpinsRequired / spinner.HitObject.Duration);
+
+                    return Precision.AlmostEquals(counter.Result.Value, rotationSpeed * 1000 * 60, 1);
+                }
+            });
+        }
+
+        [Test]
+        public void TestSpinnerGetsNoBonusScore()
+        {
+            DrawableSpinner spinner = null;
+            List<JudgementResult> results = new List<JudgementResult>();
+
+            CreateModTest(new ModTestData
+            {
+                Mod = new OsuModSpunOut(),
+                Autoplay = false,
+                Beatmap = singleSpinnerBeatmap,
+                PassCondition = () =>
+                {
+                    // Bind to the first spinner's results for further tracking.
+                    if (spinner == null)
+                    {
+                        // We only care about the first spinner we encounter for this test.
+                        var nextSpinner = Player.ChildrenOfType<DrawableSpinner>().SingleOrDefault();
+
+                        if (nextSpinner == null)
+                            return false;
+
+                        spinner = nextSpinner;
+                        spinner.OnNewResult += (o, result) => results.Add(result);
+
+                        results.Clear();
+                    }
+
+                    // we should only be checking the bonus/progress after the spinner has fully completed.
+                    if (results.OfType<OsuSpinnerJudgementResult>().All(r => r.TimeCompleted == null))
+                        return false;
+
+                    return
+                        results.Any(r => r.Type == HitResult.SmallBonus)
+                        && results.All(r => r.Type != HitResult.LargeBonus);
                 }
             });
         }

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

@@ -45,7 +45,11 @@ namespace osu.Game.Rulesets.Osu.Mods
             // for that reason using ElapsedFrameTime directly leads to fewer SPM with Half Time and more SPM with Double Time.
             // for spinners we want the real (wall clock) elapsed time; to achieve that, unapply the clock rate locally here.
             double rateIndependentElapsedTime = spinner.Clock.ElapsedFrameTime / spinner.Clock.Rate;
-            spinner.RotationTracker.AddRotation(MathUtils.RadiansToDegrees((float)rateIndependentElapsedTime * 0.03f));
+
+            // multiply the SPM by 1.01 to ensure that the spinner is completed. if the calculation is left exact,
+            // some spinners may not complete due to very minor decimal loss during calculation
+            float rotationSpeed = (float)(1.01 * spinner.HitObject.SpinsRequired / spinner.HitObject.Duration);
+            spinner.RotationTracker.AddRotation(MathUtils.RadiansToDegrees((float)rateIndependentElapsedTime * rotationSpeed * MathF.PI * 2.0f));
         }
     }
 }

osu.Game.Tests/Chat/MessageFormatterTests.cs

@@ -409,26 +409,26 @@ namespace osu.Game.Tests.Chat
 
             Assert.AreEqual(result.Content, result.DisplayContent);
             Assert.AreEqual(2, result.Links.Count);
-            Assert.AreEqual("osu://chan/#english", result.Links[0].Url);
-            Assert.AreEqual("osu://chan/#japanese", result.Links[1].Url);
+            Assert.AreEqual($"{OsuGameBase.OSU_PROTOCOL}chan/#english", result.Links[0].Url);
+            Assert.AreEqual($"{OsuGameBase.OSU_PROTOCOL}chan/#japanese", result.Links[1].Url);
         }
 
         [Test]
         public void TestOsuProtocol()
         {
-            Message result = MessageFormatter.FormatMessage(new Message { Content = "This is a custom protocol osu://chan/#english." });
+            Message result = MessageFormatter.FormatMessage(new Message { Content = $"This is a custom protocol {OsuGameBase.OSU_PROTOCOL}chan/#english." });
 
             Assert.AreEqual(result.Content, result.DisplayContent);
             Assert.AreEqual(1, result.Links.Count);
-            Assert.AreEqual("osu://chan/#english", result.Links[0].Url);
+            Assert.AreEqual($"{OsuGameBase.OSU_PROTOCOL}chan/#english", result.Links[0].Url);
             Assert.AreEqual(26, result.Links[0].Index);
             Assert.AreEqual(19, result.Links[0].Length);
 
-            result = MessageFormatter.FormatMessage(new Message { Content = "This is a [custom protocol](osu://chan/#english)." });
+            result = MessageFormatter.FormatMessage(new Message { Content = $"This is a [custom protocol]({OsuGameBase.OSU_PROTOCOL}chan/#english)." });
 
             Assert.AreEqual("This is a custom protocol.", result.DisplayContent);
             Assert.AreEqual(1, result.Links.Count);
-            Assert.AreEqual("osu://chan/#english", result.Links[0].Url);
+            Assert.AreEqual($"{OsuGameBase.OSU_PROTOCOL}chan/#english", result.Links[0].Url);
             Assert.AreEqual("#english", result.Links[0].Argument);
             Assert.AreEqual(10, result.Links[0].Index);
             Assert.AreEqual(15, result.Links[0].Length);

osu.Game.Tests/Database/BeatmapImporterTests.cs

@@ -41,7 +41,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using (var importer = new BeatmapModelManager(realm, storage))
-                using (new RulesetStore(realm, storage))
+                using (new RealmRulesetStore(realm, storage))
                 {
                     Live<BeatmapSetInfo>? beatmapSet;
 
@@ -85,7 +85,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using (var importer = new BeatmapModelManager(realm, storage))
-                using (new RulesetStore(realm, storage))
+                using (new RealmRulesetStore(realm, storage))
                 {
                     Live<BeatmapSetInfo>? beatmapSet;
 
@@ -142,7 +142,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using (var importer = new BeatmapModelManager(realm, storage))
-                using (new RulesetStore(realm, storage))
+                using (new RealmRulesetStore(realm, storage))
                 {
                     Live<BeatmapSetInfo>? imported;
 
@@ -171,7 +171,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 await LoadOszIntoStore(importer, realm.Realm);
             });
@@ -183,7 +183,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var imported = await LoadOszIntoStore(importer, realm.Realm);
 
@@ -201,7 +201,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var imported = await LoadOszIntoStore(importer, realm.Realm);
 
@@ -215,7 +215,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? tempPath = TestResources.GetTestBeatmapForImport();
 
@@ -245,7 +245,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var imported = await LoadOszIntoStore(importer, realm.Realm);
                 var importedSecondTime = await LoadOszIntoStore(importer, realm.Realm);
@@ -265,7 +265,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
 
@@ -314,7 +314,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
 
@@ -366,7 +366,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
 
@@ -414,7 +414,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
 
@@ -463,7 +463,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var imported = await LoadOszIntoStore(importer, realm.Realm);
 
@@ -496,7 +496,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var progressNotification = new ImportProgressNotification();
 
@@ -532,7 +532,7 @@ namespace osu.Game.Tests.Database
                 };
 
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var imported = await LoadOszIntoStore(importer, realm.Realm);
 
@@ -582,7 +582,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var imported = await LoadOszIntoStore(importer, realm.Realm);
 
@@ -606,7 +606,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realmFactory, storage) =>
             {
                 using var importer = new BeatmapModelManager(realmFactory, storage);
-                using var store = new RulesetStore(realmFactory, storage);
+                using var store = new RealmRulesetStore(realmFactory, storage);
 
                 var imported = await LoadOszIntoStore(importer, realmFactory.Realm);
 
@@ -638,7 +638,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new NonOptimisedBeatmapImporter(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var imported = await LoadOszIntoStore(importer, realm.Realm);
 
@@ -662,7 +662,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var imported = await LoadOszIntoStore(importer, realm.Realm);
 
@@ -688,7 +688,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealm((realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 var metadata = new BeatmapMetadata
                 {
@@ -734,7 +734,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
                 using (File.OpenRead(temp))
@@ -751,7 +751,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
 
@@ -787,7 +787,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
 
@@ -829,7 +829,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
 
@@ -880,7 +880,7 @@ namespace osu.Game.Tests.Database
             RunTestWithRealmAsync(async (realm, storage) =>
             {
                 using var importer = new BeatmapModelManager(realm, storage);
-                using var store = new RulesetStore(realm, storage);
+                using var store = new RealmRulesetStore(realm, storage);
 
                 string? temp = TestResources.GetTestBeatmapForImport();
                 await importer.Import(temp);

osu.Game.Tests/Database/RulesetStoreTests.cs

@@ -14,7 +14,7 @@ namespace osu.Game.Tests.Database
         {
             RunTestWithRealm((realm, storage) =>
             {
-                var rulesets = new RulesetStore(realm, storage);
+                var rulesets = new RealmRulesetStore(realm, storage);
 
                 Assert.AreEqual(4, rulesets.AvailableRulesets.Count());
                 Assert.AreEqual(4, realm.Realm.All<RulesetInfo>().Count());
@@ -26,8 +26,8 @@ namespace osu.Game.Tests.Database
         {
             RunTestWithRealm((realm, storage) =>
             {
-                var rulesets = new RulesetStore(realm, storage);
-                var rulesets2 = new RulesetStore(realm, storage);
+                var rulesets = new RealmRulesetStore(realm, storage);
+                var rulesets2 = new RealmRulesetStore(realm, storage);
 
                 Assert.AreEqual(4, rulesets.AvailableRulesets.Count());
                 Assert.AreEqual(4, rulesets2.AvailableRulesets.Count());
@@ -42,7 +42,7 @@ namespace osu.Game.Tests.Database
         {
             RunTestWithRealm((realm, storage) =>
             {
-                var rulesets = new RulesetStore(realm, storage);
+                var rulesets = new RealmRulesetStore(realm, storage);
 
                 Assert.IsFalse(rulesets.AvailableRulesets.First().IsManaged);
                 Assert.IsFalse(rulesets.GetRuleset(0)?.IsManaged);

osu.Game.Tests/Online/TestAPIModJsonSerialization.cs

@@ -121,6 +121,17 @@ namespace osu.Game.Tests.Online
             Assert.That((deserialised?.Mods[0])?.Settings["speed_change"], Is.EqualTo(2));
         }
 
+        [Test]
+        public void TestAPIModDetachedFromSource()
+        {
+            var mod = new OsuModDoubleTime { SpeedChange = { Value = 1.01 } };
+            var apiMod = new APIMod(mod);
+
+            mod.SpeedChange.Value = 1.5;
+
+            Assert.That(apiMod.Settings["speed_change"], Is.EqualTo(1.01d));
+        }
+
         private class TestRuleset : Ruleset
         {
             public override IEnumerable<Mod> GetModsFor(ModType type) => new Mod[]

osu.Game.Tests/Online/TestSceneOnlinePlayBeatmapAvailabilityTracker.cs

@@ -49,7 +49,7 @@ namespace osu.Game.Tests.Online
         [BackgroundDependencyLoader]
         private void load(AudioManager audio, GameHost host)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.CacheAs<BeatmapManager>(beatmaps = new TestBeatmapManager(LocalStorage, Realm, rulesets, API, audio, Resources, host, Beatmap.Default));
             Dependencies.CacheAs<BeatmapModelDownloader>(beatmapDownloader = new TestBeatmapModelDownloader(beatmaps, API));
         }

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

@@ -47,7 +47,7 @@ namespace osu.Game.Tests.Visual.Background
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(manager = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(new OsuConfigManager(LocalStorage));
             Dependencies.Cache(Realm);

osu.Game.Tests/Visual/Collections/TestSceneManageCollectionsDialog.cs

@@ -36,7 +36,7 @@ namespace osu.Game.Tests.Visual.Collections
         [BackgroundDependencyLoader]
         private void load(GameHost host)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, Realm, rulesets, null, Audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
 

osu.Game.Tests/Visual/Multiplayer/QueueModeTestScene.cs

@@ -43,7 +43,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
         }

osu.Game.Tests/Visual/Multiplayer/TestSceneDrawableRoomPlaylist.cs

@@ -40,7 +40,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(manager = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
         }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiSpectatorScreen.cs

@@ -15,6 +15,7 @@ using osu.Game.Configuration;
 using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Online.Multiplayer;
 using osu.Game.Online.Multiplayer.MatchTypes.TeamVersus;
+using osu.Game.Online.Rooms;
 using osu.Game.Rulesets.UI;
 using osu.Game.Screens.OnlinePlay.Multiplayer.Spectate;
 using osu.Game.Screens.Play;
@@ -377,7 +378,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
                 Beatmap.Value = beatmapManager.GetWorkingBeatmap(importedBeatmap);
                 Ruleset.Value = importedBeatmap.Ruleset;
 
-                LoadScreen(spectatorScreen = new TestMultiSpectatorScreen(playingUsers.ToArray(), gameplayStartTime));
+                LoadScreen(spectatorScreen = new TestMultiSpectatorScreen(SelectedRoom.Value, playingUsers.ToArray(), gameplayStartTime));
             });
 
             AddUntilStep("wait for screen load", () => spectatorScreen.LoadState == LoadState.Loaded && (!waitForPlayerLoad || spectatorScreen.AllPlayersLoaded));
@@ -465,8 +466,8 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             private readonly double? gameplayStartTime;
 
-            public TestMultiSpectatorScreen(MultiplayerRoomUser[] users, double? gameplayStartTime = null)
-                : base(users)
+            public TestMultiSpectatorScreen(Room room, MultiplayerRoomUser[] users, double? gameplayStartTime = null)
+                : base(room, users)
             {
                 this.gameplayStartTime = gameplayStartTime;
             }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayer.cs

@@ -58,7 +58,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, Realm, rulesets, API, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
         }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSongSelect.cs

@@ -42,7 +42,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(manager = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
 

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSubScreen.cs

@@ -46,7 +46,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
 

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerPlaylist.cs

@@ -33,7 +33,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
         }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerQueueList.cs

@@ -34,7 +34,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, Realm, rulesets, API, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
         }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerReadyButton.cs

@@ -40,7 +40,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
 

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerSpectateButton.cs

@@ -41,7 +41,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
 

osu.Game.Tests/Visual/Multiplayer/TestScenePlaylistsSongSelect.cs

@@ -33,7 +33,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(manager = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
 

osu.Game.Tests/Visual/Multiplayer/TestSceneTeamVersus.cs

@@ -38,7 +38,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
         }

osu.Game.Tests/Visual/Navigation/TestSceneStartupBeatmapDisplay.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.Linq;
+using NUnit.Framework;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Testing;
+using osu.Game.Online.API;
+using osu.Game.Online.API.Requests;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Overlays;
+using osu.Game.Overlays.BeatmapSet;
+
+namespace osu.Game.Tests.Visual.Navigation
+{
+    public class TestSceneStartupBeatmapDisplay : OsuGameTestScene
+    {
+        private const int requested_beatmap_id = 75;
+        private const int requested_beatmap_set_id = 1;
+
+        protected override TestOsuGame CreateTestGame() => new TestOsuGame(LocalStorage, API, new[] { $"osu://b/{requested_beatmap_id}" });
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            ((DummyAPIAccess)API).HandleRequest = request =>
+            {
+                switch (request)
+                {
+                    case GetBeatmapSetRequest gbr:
+                        var apiBeatmapSet = CreateAPIBeatmapSet();
+                        apiBeatmapSet.OnlineID = requested_beatmap_set_id;
+                        apiBeatmapSet.Beatmaps = apiBeatmapSet.Beatmaps.Append(new APIBeatmap
+                        {
+                            DifficultyName = "Target difficulty",
+                            OnlineID = requested_beatmap_id,
+                        }).ToArray();
+
+                        gbr.TriggerSuccess(apiBeatmapSet);
+                        return true;
+                }
+
+                return false;
+            };
+        });
+
+        [Test]
+        public void TestBeatmapLink()
+        {
+            AddUntilStep("Beatmap overlay displayed", () => Game.ChildrenOfType<BeatmapSetOverlay>().FirstOrDefault()?.State.Value == Visibility.Visible);
+            AddUntilStep("Beatmap overlay showing content", () => Game.ChildrenOfType<BeatmapPicker>().FirstOrDefault()?.Beatmap.Value.OnlineID == requested_beatmap_id);
+        }
+    }
+}

osu.Game.Tests/Visual/Navigation/TestSceneStartupBeatmapSetDisplay.cs

@@ -0,0 +1,52 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Testing;
+using osu.Game.Online.API;
+using osu.Game.Online.API.Requests;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Overlays;
+
+namespace osu.Game.Tests.Visual.Navigation
+{
+    public class TestSceneStartupBeatmapSetDisplay : OsuGameTestScene
+    {
+        private const int requested_beatmap_set_id = 1;
+
+        protected override TestOsuGame CreateTestGame() => new TestOsuGame(LocalStorage, API, new[] { $"osu://s/{requested_beatmap_set_id}" });
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            ((DummyAPIAccess)API).HandleRequest = request =>
+            {
+                switch (request)
+                {
+                    case GetBeatmapSetRequest gbr:
+
+                        var apiBeatmapSet = CreateAPIBeatmapSet();
+                        apiBeatmapSet.OnlineID = requested_beatmap_set_id;
+                        apiBeatmapSet.Beatmaps = apiBeatmapSet.Beatmaps.Append(new APIBeatmap
+                        {
+                            DifficultyName = "Target difficulty",
+                            OnlineID = 75,
+                        }).ToArray();
+                        gbr.TriggerSuccess(apiBeatmapSet);
+                        return true;
+                }
+
+                return false;
+            };
+        });
+
+        [Test]
+        public void TestBeatmapSetLink()
+        {
+            AddUntilStep("Beatmap overlay displayed", () => Game.ChildrenOfType<BeatmapSetOverlay>().FirstOrDefault()?.State.Value == Visibility.Visible);
+            AddUntilStep("Beatmap overlay showing content", () => Game.ChildrenOfType<BeatmapSetOverlay>().FirstOrDefault()?.Header.BeatmapSet.Value.OnlineID == requested_beatmap_set_id);
+        }
+    }
+}

osu.Game.Tests/Visual/Online/TestSceneChatLink.cs

@@ -87,8 +87,8 @@ namespace osu.Game.Tests.Visual.Online
             addMessageWithChecks("likes to post this [https://dev.ppy.sh/home link].", 1, true, true, expectedActions: LinkAction.External);
             addMessageWithChecks("Join my multiplayer game osump://12346.", 1, expectedActions: LinkAction.JoinMultiplayerMatch);
             addMessageWithChecks("Join my [multiplayer game](osump://12346).", 1, expectedActions: LinkAction.JoinMultiplayerMatch);
-            addMessageWithChecks("Join my [#english](osu://chan/#english).", 1, expectedActions: LinkAction.OpenChannel);
-            addMessageWithChecks("Join my osu://chan/#english.", 1, expectedActions: LinkAction.OpenChannel);
+            addMessageWithChecks($"Join my [#english]({OsuGameBase.OSU_PROTOCOL}chan/#english).", 1, expectedActions: LinkAction.OpenChannel);
+            addMessageWithChecks($"Join my {OsuGameBase.OSU_PROTOCOL}chan/#english.", 1, expectedActions: LinkAction.OpenChannel);
             addMessageWithChecks("Join my #english or #japanese channels.", 2, expectedActions: new[] { LinkAction.OpenChannel, LinkAction.OpenChannel });
             addMessageWithChecks("Join my #english or #nonexistent #hashtag channels.", 1, expectedActions: LinkAction.OpenChannel);
 

osu.Game.Tests/Visual/Playlists/TestScenePlaylistsRoomCreation.cs

@@ -39,7 +39,7 @@ namespace osu.Game.Tests.Visual.Playlists
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(manager = new BeatmapManager(LocalStorage, Realm, rulesets, API, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
         }

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

@@ -43,7 +43,7 @@ namespace osu.Game.Tests.Visual.SongSelect
         {
             var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
 
-            dependencies.Cache(rulesetStore = new RulesetStore(Realm));
+            dependencies.Cache(rulesetStore = new RealmRulesetStore(Realm));
             dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, Realm, rulesetStore, null, dependencies.Get<AudioManager>(), Resources, dependencies.Get<GameHost>(), Beatmap.Default));
             dependencies.Cache(scoreManager = new ScoreManager(rulesetStore, () => beatmapManager, LocalStorage, Realm, Scheduler));
             Dependencies.Cache(Realm);

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

@@ -36,7 +36,7 @@ namespace osu.Game.Tests.Visual.SongSelect
         [BackgroundDependencyLoader]
         private void load(GameHost host)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, Realm, rulesets, null, Audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(Realm);
 

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

@@ -47,7 +47,7 @@ namespace osu.Game.Tests.Visual.SongSelect
         {
             // These DI caches are required to ensure for interactive runs this test scene doesn't nuke all user beatmaps in the local install.
             // At a point we have isolated interactive test runs enough, this can likely be removed.
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(Realm);
             Dependencies.Cache(manager = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, defaultBeatmap = Beatmap.Default));
 

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

@@ -28,7 +28,7 @@ namespace osu.Game.Tests.Visual.SongSelect
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
-            Dependencies.Cache(rulesets = new RulesetStore(Realm));
+            Dependencies.Cache(rulesets = new RealmRulesetStore(Realm));
             Dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, Realm, rulesets, null, audio, Resources, host, Beatmap.Default));
             Dependencies.Cache(scoreManager = new ScoreManager(rulesets, () => beatmapManager, LocalStorage, Realm, Scheduler));
             Dependencies.Cache(Realm);

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

@@ -87,7 +87,7 @@ namespace osu.Game.Tests.Visual.UserInterface
         {
             var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
 
-            dependencies.Cache(rulesetStore = new RulesetStore(Realm));
+            dependencies.Cache(rulesetStore = new RealmRulesetStore(Realm));
             dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, Realm, rulesetStore, null, dependencies.Get<AudioManager>(), Resources, dependencies.Get<GameHost>(), Beatmap.Default));
             dependencies.Cache(scoreManager = new ScoreManager(dependencies.Get<RulesetStore>(), () => beatmapManager, LocalStorage, Realm, Scheduler));
             Dependencies.Cache(Realm);

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

@@ -0,0 +1,81 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Overlays;
+using osu.Game.Overlays.Mods;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Osu.Mods;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    [TestFixture]
+    public class TestSceneModPanel : OsuManualInputManagerTestScene
+    {
+        [Cached]
+        private OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Green);
+
+        [Test]
+        public void TestVariousPanels()
+        {
+            AddStep("create content", () => Child = new FillFlowContainer
+            {
+                Width = 300,
+                AutoSizeAxes = Axes.Y,
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Spacing = new Vector2(0, 5),
+                Children = new[]
+                {
+                    new ModPanel(new OsuModHalfTime()),
+                    new ModPanel(new OsuModFlashlight()),
+                    new ModPanel(new OsuModAutoplay()),
+                    new ModPanel(new OsuModAlternate()),
+                    new ModPanel(new OsuModApproachDifferent())
+                }
+            });
+        }
+
+        [Test]
+        public void TestIncompatibilityDisplay()
+        {
+            IncompatibilityDisplayingModPanel panel = null;
+
+            AddStep("create panel with DT", () => Child = panel = new IncompatibilityDisplayingModPanel(new OsuModDoubleTime())
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                RelativeSizeAxes = Axes.None,
+                Width = 300
+            });
+
+            clickPanel();
+            AddAssert("panel active", () => panel.Active.Value);
+
+            clickPanel();
+            AddAssert("panel not active", () => !panel.Active.Value);
+
+            AddStep("set incompatible mod", () => SelectedMods.Value = new[] { new OsuModHalfTime() });
+
+            clickPanel();
+            AddAssert("panel not active", () => !panel.Active.Value);
+
+            AddStep("reset mods", () => SelectedMods.Value = Array.Empty<Mod>());
+
+            clickPanel();
+            AddAssert("panel active", () => panel.Active.Value);
+
+            void clickPanel() => AddStep("click panel", () =>
+            {
+                InputManager.MoveMouseTo(panel);
+                InputManager.Click(MouseButton.Left);
+            });
+        }
+    }
+}

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

@@ -0,0 +1,85 @@
+// 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.Linq;
+using NUnit.Framework;
+using osu.Framework.Extensions.IEnumerableExtensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Testing;
+using osu.Game.Overlays;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Catch;
+using osu.Game.Rulesets.Mania;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Rulesets.Taiko;
+using osu.Game.Rulesets.UI;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    [TestFixture]
+    public class TestSceneModSwitchSmall : OsuTestScene
+    {
+        [Test]
+        public void TestOsu() => createSwitchTestFor(new OsuRuleset());
+
+        [Test]
+        public void TestTaiko() => createSwitchTestFor(new TaikoRuleset());
+
+        [Test]
+        public void TestCatch() => createSwitchTestFor(new CatchRuleset());
+
+        [Test]
+        public void TestMania() => createSwitchTestFor(new ManiaRuleset());
+
+        private void createSwitchTestFor(Ruleset ruleset)
+        {
+            AddStep("no colour scheme", () => Child = createContent(ruleset, null));
+
+            foreach (var scheme in Enum.GetValues(typeof(OverlayColourScheme)).Cast<OverlayColourScheme>())
+            {
+                AddStep($"{scheme} colour scheme", () => Child = createContent(ruleset, scheme));
+            }
+
+            AddToggleStep("toggle active", active => this.ChildrenOfType<ModSwitchTiny>().ForEach(s => s.Active.Value = active));
+        }
+
+        private static Drawable createContent(Ruleset ruleset, OverlayColourScheme? colourScheme)
+        {
+            var switchFlow = new FillFlowContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                Direction = FillDirection.Vertical,
+                Spacing = new Vector2(10),
+                Padding = new MarginPadding(20),
+                ChildrenEnumerable = ruleset.CreateAllMods()
+                                            .GroupBy(mod => mod.Type)
+                                            .Select(group => new FillFlowContainer
+                                            {
+                                                RelativeSizeAxes = Axes.X,
+                                                AutoSizeAxes = Axes.Y,
+                                                Direction = FillDirection.Full,
+                                                Spacing = new Vector2(5),
+                                                ChildrenEnumerable = group.Select(mod => new ModSwitchSmall(mod))
+                                            })
+            };
+
+            if (colourScheme != null)
+            {
+                return new DependencyProvidingContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    CachedDependencies = new (Type, object)[]
+                    {
+                        (typeof(OverlayColourProvider), new OverlayColourProvider(colourScheme.Value))
+                    },
+                    Child = switchFlow
+                };
+            }
+
+            return switchFlow;
+        }
+    }
+}

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

@@ -0,0 +1,85 @@
+// 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.Linq;
+using NUnit.Framework;
+using osu.Framework.Extensions.IEnumerableExtensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Testing;
+using osu.Game.Overlays;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Catch;
+using osu.Game.Rulesets.Mania;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Rulesets.Taiko;
+using osu.Game.Rulesets.UI;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    [TestFixture]
+    public class TestSceneModSwitchTiny : OsuTestScene
+    {
+        [Test]
+        public void TestOsu() => createSwitchTestFor(new OsuRuleset());
+
+        [Test]
+        public void TestTaiko() => createSwitchTestFor(new TaikoRuleset());
+
+        [Test]
+        public void TestCatch() => createSwitchTestFor(new CatchRuleset());
+
+        [Test]
+        public void TestMania() => createSwitchTestFor(new ManiaRuleset());
+
+        private void createSwitchTestFor(Ruleset ruleset)
+        {
+            AddStep("no colour scheme", () => Child = createContent(ruleset, null));
+
+            foreach (var scheme in Enum.GetValues(typeof(OverlayColourScheme)).Cast<OverlayColourScheme>())
+            {
+                AddStep($"{scheme} colour scheme", () => Child = createContent(ruleset, scheme));
+            }
+
+            AddToggleStep("toggle active", active => this.ChildrenOfType<ModSwitchTiny>().ForEach(s => s.Active.Value = active));
+        }
+
+        private static Drawable createContent(Ruleset ruleset, OverlayColourScheme? colourScheme)
+        {
+            var switchFlow = new FillFlowContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                Direction = FillDirection.Vertical,
+                Spacing = new Vector2(10),
+                Padding = new MarginPadding(20),
+                ChildrenEnumerable = ruleset.CreateAllMods()
+                                            .GroupBy(mod => mod.Type)
+                                            .Select(group => new FillFlowContainer
+                                            {
+                                                RelativeSizeAxes = Axes.X,
+                                                AutoSizeAxes = Axes.Y,
+                                                Direction = FillDirection.Full,
+                                                Spacing = new Vector2(5),
+                                                ChildrenEnumerable = group.Select(mod => new ModSwitchTiny(mod))
+                                            })
+            };
+
+            if (colourScheme != null)
+            {
+                return new DependencyProvidingContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    CachedDependencies = new (Type, object)[]
+                    {
+                        (typeof(OverlayColourProvider), new OverlayColourProvider(colourScheme.Value))
+                    },
+                    Child = switchFlow
+                };
+            }
+
+            return switchFlow;
+        }
+    }
+}

osu.Game/Beatmaps/BeatmapInfo.cs

@@ -152,18 +152,6 @@ namespace osu.Game.Beatmaps
 
         #region Compatibility properties
 
-        [Ignored]
-        public int RulesetID
-        {
-            set
-            {
-                if (!string.IsNullOrEmpty(Ruleset.InstantiationInfo))
-                    throw new InvalidOperationException($"Cannot set a {nameof(RulesetID)} when {nameof(Ruleset)} is already set to an actual ruleset.");
-
-                Ruleset.OnlineID = value;
-            }
-        }
-
         [Ignored]
         [Obsolete("Use BeatmapInfo.Difficulty instead.")] // can be removed 20220719
         public BeatmapDifficulty BaseDifficulty

osu.Game/Beatmaps/FlatFileWorkingBeatmap.cs

@@ -7,7 +7,6 @@ using osu.Framework.Audio.Track;
 using osu.Framework.Graphics.Textures;
 using osu.Game.Beatmaps.Formats;
 using osu.Game.IO;
-using osu.Game.Rulesets;
 using osu.Game.Skinning;
 
 namespace osu.Game.Beatmaps
@@ -20,18 +19,16 @@ namespace osu.Game.Beatmaps
     {
         private readonly Beatmap beatmap;
 
-        public FlatFileWorkingBeatmap(string file, Func<int, Ruleset> rulesetProvider, int? beatmapId = null)
-            : this(readFromFile(file), rulesetProvider, beatmapId)
+        public FlatFileWorkingBeatmap(string file, int? beatmapId = null)
+            : this(readFromFile(file), beatmapId)
         {
         }
 
-        private FlatFileWorkingBeatmap(Beatmap beatmap, Func<int, Ruleset> rulesetProvider, int? beatmapId = null)
+        private FlatFileWorkingBeatmap(Beatmap beatmap, int? beatmapId = null)
             : base(beatmap.BeatmapInfo, null)
         {
             this.beatmap = beatmap;
 
-            beatmap.BeatmapInfo.Ruleset = rulesetProvider(beatmap.BeatmapInfo.Ruleset.OnlineID).RulesetInfo;
-
             if (beatmapId.HasValue)
                 beatmap.BeatmapInfo.OnlineID = beatmapId.Value;
         }

osu.Game/Beatmaps/Formats/Decoder.cs

@@ -5,7 +5,9 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using JetBrains.Annotations;
 using osu.Game.IO;
+using osu.Game.Rulesets;
 
 namespace osu.Game.Beatmaps.Formats
 {
@@ -37,6 +39,15 @@ namespace osu.Game.Beatmaps.Formats
             LegacyStoryboardDecoder.Register();
         }
 
+        /// <summary>
+        /// Register dependencies for use with static decoder classes.
+        /// </summary>
+        /// <param name="rulesets">A store containing all available rulesets (used by <see cref="LegacyBeatmapDecoder"/>).</param>
+        public static void RegisterDependencies([NotNull] RulesetStore rulesets)
+        {
+            LegacyBeatmapDecoder.RulesetStore = rulesets ?? throw new ArgumentNullException(nameof(rulesets));
+        }
+
         /// <summary>
         /// Retrieves a <see cref="Decoder"/> to parse a <see cref="Beatmap"/>.
         /// </summary>

osu.Game/Beatmaps/Formats/LegacyBeatmapDecoder.cs

@@ -7,16 +7,20 @@ using System.IO;
 using System.Linq;
 using osu.Framework.Extensions;
 using osu.Framework.Extensions.EnumExtensions;
+using osu.Framework.Logging;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Beatmaps.Legacy;
 using osu.Game.Beatmaps.Timing;
 using osu.Game.IO;
+using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects.Legacy;
 
 namespace osu.Game.Beatmaps.Formats
 {
     public class LegacyBeatmapDecoder : LegacyDecoder<Beatmap>
     {
+        internal static RulesetStore RulesetStore;
+
         private Beatmap beatmap;
 
         private ConvertHitObjectParser parser;
@@ -40,6 +44,12 @@ namespace osu.Game.Beatmaps.Formats
         public LegacyBeatmapDecoder(int version = LATEST_VERSION)
             : base(version)
         {
+            if (RulesetStore == null)
+            {
+                Logger.Log($"A {nameof(RulesetStore)} was not provided via {nameof(Decoder)}.{nameof(RegisterDependencies)}; falling back to default {nameof(AssemblyRulesetStore)}.");
+                RulesetStore = new AssemblyRulesetStore();
+            }
+
             // BeatmapVersion 4 and lower had an incorrect offset (stable has this set as 24ms off)
             offset = FormatVersion < 5 ? 24 : 0;
         }
@@ -158,7 +168,7 @@ namespace osu.Game.Beatmaps.Formats
                 case @"Mode":
                     int rulesetID = Parsing.ParseInt(pair.Value);
 
-                    beatmap.BeatmapInfo.RulesetID = rulesetID;
+                    beatmap.BeatmapInfo.Ruleset = RulesetStore.GetRuleset(rulesetID) ?? throw new ArgumentException("Ruleset is not available locally.");
 
                     switch (rulesetID)
                     {

osu.Game/Graphics/OsuColour.cs

@@ -5,6 +5,7 @@ using System;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Game.Beatmaps;
 using osu.Game.Overlays;
+using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
 using osu.Game.Utils;
@@ -157,6 +158,36 @@ namespace osu.Game.Graphics
             }
         }
 
+        /// <summary>
+        /// Retrieves the main accent colour for a <see cref="ModType"/>.
+        /// </summary>
+        public Color4 ForModType(ModType modType)
+        {
+            switch (modType)
+            {
+                case ModType.Automation:
+                    return Blue1;
+
+                case ModType.DifficultyIncrease:
+                    return Red1;
+
+                case ModType.DifficultyReduction:
+                    return Lime1;
+
+                case ModType.Conversion:
+                    return Purple1;
+
+                case ModType.Fun:
+                    return Pink1;
+
+                case ModType.System:
+                    return Gray7;
+
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(modType), modType, "Unknown mod type");
+            }
+        }
+
         /// <summary>
         /// Returns a foreground text colour that is supposed to contrast well with
         /// the supplied <paramref name="backgroundColour"/>.

osu.Game/Online/API/APIAccess.cs

@@ -36,6 +36,8 @@ namespace osu.Game.Online.API
 
         public string WebsiteRootUrl { get; }
 
+        public int APIVersion => 20220217; // We may want to pull this from the game version eventually.
+
         public Exception LastLoginError { get; private set; }
 
         public string ProvidedUsername { get; private set; }

osu.Game/Online/API/APIMod.cs

@@ -42,7 +42,7 @@ namespace osu.Game.Online.API
                 var bindable = (IBindable)property.GetValue(mod);
 
                 if (!bindable.IsDefault)
-                    Settings.Add(property.Name.Underscore(), bindable);
+                    Settings.Add(property.Name.Underscore(), ModUtils.GetSettingUnderlyingValue(bindable));
             }
         }
 

osu.Game/Online/API/APIRequest.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Globalization;
 using JetBrains.Annotations;
 using Newtonsoft.Json;
 using osu.Framework.IO.Network;
@@ -112,6 +113,9 @@ namespace osu.Game.Online.API
             WebRequest = CreateWebRequest();
             WebRequest.Failed += Fail;
             WebRequest.AllowRetryOnTimeout = false;
+
+            WebRequest.AddHeader("x-api-version", API.APIVersion.ToString(CultureInfo.InvariantCulture));
+
             if (!string.IsNullOrEmpty(API.AccessToken))
                 WebRequest.AddHeader("Authorization", $"Bearer {API.AccessToken}");
 

osu.Game/Online/API/DummyAPIAccess.cs

@@ -33,6 +33,8 @@ namespace osu.Game.Online.API
 
         public string WebsiteRootUrl => "http://localhost";
 
+        public int APIVersion => int.Parse(DateTime.Now.ToString("yyyyMMdd"));
+
         public Exception LastLoginError { get; private set; }
 
         /// <summary>

osu.Game/Online/API/IAPIProvider.cs

@@ -57,6 +57,11 @@ namespace osu.Game.Online.API
         /// </summary>
         string WebsiteRootUrl { get; }
 
+        /// <summary>
+        /// The version of the API.
+        /// </summary>
+        int APIVersion { get; }
+
         /// <summary>
         /// The last login error that occurred, if any.
         /// </summary>

osu.Game/Online/API/Requests/Responses/APIUser.cs

@@ -12,6 +12,7 @@ using osu.Game.Users;
 
 namespace osu.Game.Online.API.Requests.Responses
 {
+    [JsonObject(MemberSerialization.OptIn)]
     public class APIUser : IEquatable<APIUser>, IUser
     {
         [JsonProperty(@"id")]

osu.Game/Online/Chat/ChannelManager.cs

@@ -618,7 +618,7 @@ namespace osu.Game.Online.Chat
             var req = new MarkChannelAsReadRequest(channel, message);
 
             req.Success += () => channel.LastReadId = message.Id;
-            req.Failure += e => Logger.Error(e, $"Failed to mark channel {channel} up to '{message}' as read");
+            req.Failure += e => Logger.Log($"Failed to mark channel {channel} up to '{message}' as read ({e.Message})", LoggingTarget.Network);
 
             api.Queue(req);
         }

osu.Game/Online/Chat/MessageFormatter.cs

@@ -268,10 +268,10 @@ namespace osu.Game.Online.Chat
             handleAdvanced(advanced_link_regex, result, startIndex);
 
             // handle editor times
-            handleMatches(time_regex, "{0}", "osu://edit/{0}", result, startIndex, LinkAction.OpenEditorTimestamp);
+            handleMatches(time_regex, "{0}", $@"{OsuGameBase.OSU_PROTOCOL}edit/{{0}}", result, startIndex, LinkAction.OpenEditorTimestamp);
 
             // handle channels
-            handleMatches(channel_regex, "{0}", "osu://chan/{0}", result, startIndex, LinkAction.OpenChannel);
+            handleMatches(channel_regex, "{0}", $@"{OsuGameBase.OSU_PROTOCOL}chan/{{0}}", result, startIndex, LinkAction.OpenChannel);
 
             string empty = "";
             while (space-- > 0)

osu.Game/Online/Rooms/PlaylistItem.cs

@@ -62,6 +62,10 @@ namespace osu.Game.Online.Rooms
         [JsonProperty("beatmap_id")]
         private int onlineBeatmapId => Beatmap.OnlineID;
 
+        /// <summary>
+        /// A beatmap representing this playlist item.
+        /// In many cases, this will *not* contain any usable information apart from OnlineID.
+        /// </summary>
         [JsonIgnore]
         public IBeatmapInfo Beatmap { get; set; } = null!;
 

osu.Game/Online/Rooms/Room.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.Linq;
-using JetBrains.Annotations;
 using Newtonsoft.Json;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
@@ -15,6 +14,7 @@ using osu.Game.Utils;
 
 namespace osu.Game.Online.Rooms
 {
+    [JsonObject(MemberSerialization.OptIn)]
     public class Room : IDeepCloneable<Room>
     {
         [Cached]
@@ -37,8 +37,19 @@ namespace osu.Game.Online.Rooms
         [JsonProperty("channel_id")]
         public readonly Bindable<int> ChannelId = new Bindable<int>();
 
+        [JsonProperty("current_playlist_item")]
+        [Cached]
+        public readonly Bindable<PlaylistItem> CurrentPlaylistItem = new Bindable<PlaylistItem>();
+
+        [JsonProperty("playlist_item_stats")]
+        [Cached]
+        public readonly Bindable<RoomPlaylistItemStats> PlaylistItemStats = new Bindable<RoomPlaylistItemStats>();
+
+        [JsonProperty("difficulty_range")]
+        [Cached]
+        public readonly Bindable<RoomDifficultyRange> DifficultyRange = new Bindable<RoomDifficultyRange>();
+
         [Cached]
-        [JsonIgnore]
         public readonly Bindable<RoomCategory> Category = new Bindable<RoomCategory>();
 
         // Todo: osu-framework bug (https://github.com/ppy/osu-framework/issues/4106)
@@ -51,19 +62,15 @@ namespace osu.Game.Online.Rooms
         }
 
         [Cached]
-        [JsonIgnore]
         public readonly Bindable<int?> MaxAttempts = new Bindable<int?>();
 
         [Cached]
-        [JsonIgnore]
         public readonly Bindable<RoomStatus> Status = new Bindable<RoomStatus>(new RoomStatusOpen());
 
         [Cached]
-        [JsonIgnore]
         public readonly Bindable<RoomAvailability> Availability = new Bindable<RoomAvailability>();
 
         [Cached]
-        [JsonIgnore]
         public readonly Bindable<MatchType> Type = new Bindable<MatchType>();
 
         // Todo: osu-framework bug (https://github.com/ppy/osu-framework/issues/4106)
@@ -76,7 +83,6 @@ namespace osu.Game.Online.Rooms
         }
 
         [Cached]
-        [JsonIgnore]
         public readonly Bindable<QueueMode> QueueMode = new Bindable<QueueMode>();
 
         [JsonConverter(typeof(SnakeCaseStringEnumConverter))]
@@ -88,7 +94,6 @@ namespace osu.Game.Online.Rooms
         }
 
         [Cached]
-        [JsonIgnore]
         public readonly Bindable<int?> MaxParticipants = new Bindable<int?>();
 
         [Cached]
@@ -113,7 +118,6 @@ namespace osu.Game.Online.Rooms
         public readonly Bindable<string> Password = new Bindable<string>();
 
         [Cached]
-        [JsonIgnore]
         public readonly Bindable<TimeSpan?> Duration = new Bindable<TimeSpan?>();
 
         [JsonProperty("duration")]
@@ -158,6 +162,8 @@ namespace osu.Game.Online.Rooms
             var copy = new Room();
 
             copy.CopyFrom(this);
+
+            // ID must be unset as we use this as a marker for whether this is a client-side (not-yet-created) room or not.
             copy.RoomID.Value = null;
 
             return copy;
@@ -183,6 +189,9 @@ namespace osu.Game.Online.Rooms
             EndDate.Value = other.EndDate.Value;
             UserScore.Value = other.UserScore.Value;
             QueueMode.Value = other.QueueMode.Value;
+            DifficultyRange.Value = other.DifficultyRange.Value;
+            PlaylistItemStats.Value = other.PlaylistItemStats.Value;
+            CurrentPlaylistItem.Value = other.CurrentPlaylistItem.Value;
 
             if (EndDate.Value != null && DateTimeOffset.Now >= EndDate.Value)
                 Status.Value = new RoomStatusEnded();
@@ -211,21 +220,27 @@ namespace osu.Game.Online.Rooms
                 Playlist.RemoveAll(i => i.Expired);
         }
 
-        #region Newtonsoft.Json implicit ShouldSerialize() methods
+        [JsonObject(MemberSerialization.OptIn)]
+        public class RoomPlaylistItemStats
+        {
+            [JsonProperty("count_active")]
+            public int CountActive;
 
-        // The properties in this region are used implicitly by Newtonsoft.Json to not serialise certain fields in some cases.
-        // They rely on being named exactly the same as the corresponding fields (casing included) and as such should NOT be renamed
-        // unless the fields are also renamed.
+            [JsonProperty("count_total")]
+            public int CountTotal;
 
-        [UsedImplicitly]
-        public bool ShouldSerializeRoomID() => false;
+            [JsonProperty("ruleset_ids")]
+            public int[] RulesetIDs;
+        }
 
-        [UsedImplicitly]
-        public bool ShouldSerializeHost() => false;
+        [JsonObject(MemberSerialization.OptIn)]
+        public class RoomDifficultyRange
+        {
+            [JsonProperty("min")]
+            public double Min;
 
-        [UsedImplicitly]
-        public bool ShouldSerializeEndDate() => false;
-
-        #endregion
+            [JsonProperty("max")]
+            public double Max;
+        }
     }
 }

osu.Game/Online/SignalRUnionWorkaroundResolver.cs

@@ -27,7 +27,7 @@ namespace osu.Game.Online
 
             // This should not be required. The fallback should work. But something is weird with the way caching is done.
             // For future adventurers, I would not advise looking into this further. It's likely not worth the effort.
-            baseMap = baseMap.Concat(baseMap.Select(t => (t.baseType, t.baseType)));
+            baseMap = baseMap.Concat(baseMap.Select(t => (t.baseType, t.baseType)).Distinct());
 
             return new Dictionary<Type, IMessagePackFormatter>(baseMap.Select(t =>
             {

osu.Game/OsuGame.cs

@@ -150,6 +150,7 @@ namespace osu.Game
         protected SettingsOverlay Settings;
 
         private VolumeOverlay volume;
+
         private OsuLogo osuLogo;
 
         private MainMenu menuScreen;
@@ -837,7 +838,8 @@ namespace osu.Game
                 channelManager.HighPollRate.Value =
                     chatOverlay.State.Value == Visibility.Visible
                     || API.Activity.Value is UserActivity.InLobby
-                    || API.Activity.Value is UserActivity.InMultiplayerGame;
+                    || API.Activity.Value is UserActivity.InMultiplayerGame
+                    || API.Activity.Value is UserActivity.SpectatingMultiplayerGame;
             }
 
             Add(difficultyRecommender);
@@ -898,8 +900,20 @@ namespace osu.Game
             if (args?.Length > 0)
             {
                 string[] paths = args.Where(a => !a.StartsWith('-')).ToArray();
+
                 if (paths.Length > 0)
-                    Task.Run(() => Import(paths));
+                {
+                    string firstPath = paths.First();
+
+                    if (firstPath.StartsWith(OSU_PROTOCOL, StringComparison.Ordinal))
+                    {
+                        HandleLink(firstPath);
+                    }
+                    else
+                    {
+                        Task.Run(() => Import(paths));
+                    }
+                }
             }
         }
 

osu.Game/OsuGameBase.cs

@@ -22,6 +22,7 @@ using osu.Framework.Logging;
 using osu.Framework.Platform;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.Formats;
 using osu.Game.Configuration;
 using osu.Game.Database;
 using osu.Game.Graphics;
@@ -52,6 +53,8 @@ namespace osu.Game
     /// </summary>
     public partial class OsuGameBase : Framework.Game, ICanAcceptFiles
     {
+        public const string OSU_PROTOCOL = "osu://";
+
         public const string CLIENT_STREAM_NAME = @"lazer";
 
         public const int SAMPLE_CONCURRENCY = 6;
@@ -109,7 +112,7 @@ namespace osu.Game
 
         protected SkinManager SkinManager { get; private set; }
 
-        protected RulesetStore RulesetStore { get; private set; }
+        protected RealmRulesetStore RulesetStore { get; private set; }
 
         protected RealmKeyBindingStore KeyBindingStore { get; private set; }
 
@@ -200,9 +203,11 @@ namespace osu.Game
 
             dependencies.Cache(realm = new RealmAccess(Storage, "client", EFContextFactory));
 
-            dependencies.Cache(RulesetStore = new RulesetStore(realm, Storage));
+            dependencies.CacheAs<RulesetStore>(RulesetStore = new RealmRulesetStore(realm, Storage));
             dependencies.CacheAs<IRulesetStore>(RulesetStore);
 
+            Decoder.RegisterDependencies(RulesetStore);
+
             // Backup is taken here rather than in EFToRealmMigrator to avoid recycling realm contexts
             // after initial usages below. It can be moved once a direction is established for handling re-subscription.
             // See https://github.com/ppy/osu/pull/16547 for more discussion.

osu.Game/Overlays/BeatmapSet/BeatmapPicker.cs

@@ -183,7 +183,14 @@ namespace osu.Game.Overlays.BeatmapSet
             }
 
             starRatingContainer.FadeOut(100);
-            Beatmap.Value = Difficulties.FirstOrDefault()?.Beatmap;
+
+            // If a selection is already made, try and maintain it.
+            if (Beatmap.Value != null)
+                Beatmap.Value = Difficulties.FirstOrDefault(b => b.Beatmap.OnlineID == Beatmap.Value.OnlineID)?.Beatmap;
+
+            // Else just choose the first available difficulty for now.
+            Beatmap.Value ??= Difficulties.FirstOrDefault()?.Beatmap;
+
             plays.Value = BeatmapSet?.PlayCount ?? 0;
             favourites.Value = BeatmapSet?.FavouriteCount ?? 0;
 

osu.Game/Overlays/Mods/IncompatibilityDisplayingModButton.cs

@@ -8,11 +8,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
-using osu.Game.Graphics;
-using osu.Game.Graphics.Sprites;
-using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
-using osu.Game.Screens.Play.HUD;
 using osu.Game.Utils;
 using osuTK;
 
@@ -66,52 +62,5 @@ namespace osu.Game.Overlays.Mods
         }
 
         public override ITooltip<Mod> GetCustomTooltip() => new IncompatibilityDisplayingTooltip();
-
-        private class IncompatibilityDisplayingTooltip : ModButtonTooltip
-        {
-            private readonly OsuSpriteText incompatibleText;
-
-            private readonly Bindable<IReadOnlyList<Mod>> incompatibleMods = new Bindable<IReadOnlyList<Mod>>();
-
-            [Resolved]
-            private Bindable<RulesetInfo> ruleset { get; set; }
-
-            public IncompatibilityDisplayingTooltip()
-            {
-                AddRange(new Drawable[]
-                {
-                    incompatibleText = new OsuSpriteText
-                    {
-                        Margin = new MarginPadding { Top = 5 },
-                        Font = OsuFont.GetFont(weight: FontWeight.Regular),
-                        Text = "Incompatible with:"
-                    },
-                    new ModDisplay
-                    {
-                        Current = incompatibleMods,
-                        ExpansionMode = ExpansionMode.AlwaysExpanded,
-                        Scale = new Vector2(0.7f)
-                    }
-                });
-            }
-
-            [BackgroundDependencyLoader]
-            private void load(OsuColour colours)
-            {
-                incompatibleText.Colour = colours.BlueLight;
-            }
-
-            protected override void UpdateDisplay(Mod mod)
-            {
-                base.UpdateDisplay(mod);
-
-                var incompatibleTypes = mod.IncompatibleMods;
-
-                var allMods = ruleset.Value.CreateInstance().AllMods;
-
-                incompatibleMods.Value = allMods.Where(m => m.GetType() != mod.GetType() && incompatibleTypes.Any(t => t.IsInstanceOfType(m))).Select(m => m.CreateInstance()).ToList();
-                incompatibleText.Text = incompatibleMods.Value.Any() ? "Incompatible with:" : "Compatible with all mods";
-            }
-        }
     }
 }

osu.Game/Overlays/Mods/IncompatibilityDisplayingModPanel.cs

@@ -0,0 +1,88 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Cursor;
+using osu.Framework.Input.Events;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Utils;
+
+namespace osu.Game.Overlays.Mods
+{
+    public class IncompatibilityDisplayingModPanel : ModPanel, IHasCustomTooltip<Mod>
+    {
+        private readonly BindableBool incompatible = new BindableBool();
+
+        [Resolved]
+        private Bindable<IReadOnlyList<Mod>> selectedMods { get; set; }
+
+        public IncompatibilityDisplayingModPanel(Mod mod)
+            : base(mod)
+        {
+        }
+
+        protected override void LoadComplete()
+        {
+            selectedMods.BindValueChanged(_ => updateIncompatibility(), true);
+            incompatible.BindValueChanged(_ => Scheduler.AddOnce(UpdateState));
+            // base call will run `UpdateState()` first time and finish transforms.
+            base.LoadComplete();
+        }
+
+        private void updateIncompatibility()
+        {
+            incompatible.Value = selectedMods.Value.Count > 0 && !selectedMods.Value.Contains(Mod) && !ModUtils.CheckCompatibleSet(selectedMods.Value.Append(Mod));
+        }
+
+        protected override void UpdateState()
+        {
+            Action = incompatible.Value ? () => { } : (Action)Active.Toggle;
+
+            if (incompatible.Value)
+            {
+                Colour4 backgroundColour = ColourProvider.Background5;
+                Colour4 textBackgroundColour = ColourProvider.Background4;
+
+                Content.TransformTo(nameof(BorderColour), ColourInfo.GradientVertical(backgroundColour, textBackgroundColour), TRANSITION_DURATION, Easing.OutQuint);
+                Background.FadeColour(backgroundColour, TRANSITION_DURATION, Easing.OutQuint);
+
+                SwitchContainer.ResizeWidthTo(IDLE_SWITCH_WIDTH, TRANSITION_DURATION, Easing.OutQuint);
+                SwitchContainer.FadeColour(Colour4.Gray, TRANSITION_DURATION, Easing.OutQuint);
+                MainContentContainer.TransformTo(nameof(Padding), new MarginPadding
+                {
+                    Left = IDLE_SWITCH_WIDTH,
+                    Right = CORNER_RADIUS
+                }, TRANSITION_DURATION, Easing.OutQuint);
+
+                TextBackground.FadeColour(textBackgroundColour, TRANSITION_DURATION, Easing.OutQuint);
+                TextFlow.FadeColour(Colour4.White.Opacity(0.5f), TRANSITION_DURATION, Easing.OutQuint);
+                return;
+            }
+
+            SwitchContainer.FadeColour(Colour4.White, TRANSITION_DURATION, Easing.OutQuint);
+            base.UpdateState();
+        }
+
+        protected override bool OnMouseDown(MouseDownEvent e)
+        {
+            if (incompatible.Value)
+                return true; // bypasses base call purposely in order to not play out the intermediate state animation.
+
+            return base.OnMouseDown(e);
+        }
+
+        #region IHasCustomTooltip
+
+        public ITooltip<Mod> GetCustomTooltip() => new IncompatibilityDisplayingTooltip();
+
+        public Mod TooltipContent => Mod;
+
+        #endregion
+    }
+}

osu.Game/Overlays/Mods/IncompatibilityDisplayingTooltip.cs

@@ -0,0 +1,64 @@
+// 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 osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Screens.Play.HUD;
+using osuTK;
+
+namespace osu.Game.Overlays.Mods
+{
+    internal class IncompatibilityDisplayingTooltip : ModButtonTooltip
+    {
+        private readonly OsuSpriteText incompatibleText;
+
+        private readonly Bindable<IReadOnlyList<Mod>> incompatibleMods = new Bindable<IReadOnlyList<Mod>>();
+
+        [Resolved]
+        private Bindable<RulesetInfo> ruleset { get; set; }
+
+        public IncompatibilityDisplayingTooltip()
+        {
+            AddRange(new Drawable[]
+            {
+                incompatibleText = new OsuSpriteText
+                {
+                    Margin = new MarginPadding { Top = 5 },
+                    Font = OsuFont.GetFont(weight: FontWeight.Regular),
+                    Text = "Incompatible with:"
+                },
+                new ModDisplay
+                {
+                    Current = incompatibleMods,
+                    ExpansionMode = ExpansionMode.AlwaysExpanded,
+                    Scale = new Vector2(0.7f)
+                }
+            });
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            incompatibleText.Colour = colours.BlueLight;
+        }
+
+        protected override void UpdateDisplay(Mod mod)
+        {
+            base.UpdateDisplay(mod);
+
+            var incompatibleTypes = mod.IncompatibleMods;
+
+            var allMods = ruleset.Value.CreateInstance().AllMods;
+
+            incompatibleMods.Value = allMods.Where(m => m.GetType() != mod.GetType() && incompatibleTypes.Any(t => t.IsInstanceOfType(m))).Select(m => m.CreateInstance()).ToList();
+            incompatibleText.Text = incompatibleMods.Value.Any() ? "Incompatible with:" : "Compatible with all mods";
+        }
+    }
+}

osu.Game/Overlays/Mods/ModPanel.cs

@@ -0,0 +1,239 @@
+// 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.Audio;
+using osu.Framework.Audio.Sample;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Events;
+using osu.Framework.Utils;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Graphics.UserInterface;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.UI;
+using osuTK;
+using osuTK.Input;
+
+#nullable enable
+
+namespace osu.Game.Overlays.Mods
+{
+    public class ModPanel : OsuClickableContainer
+    {
+        public Mod Mod { get; }
+        public BindableBool Active { get; } = new BindableBool();
+
+        protected readonly Box Background;
+        protected readonly Container SwitchContainer;
+        protected readonly Container MainContentContainer;
+        protected readonly Box TextBackground;
+        protected readonly FillFlowContainer TextFlow;
+
+        [Resolved]
+        protected OverlayColourProvider ColourProvider { get; private set; } = null!;
+
+        protected const double TRANSITION_DURATION = 150;
+
+        protected const float SHEAR_X = 0.2f;
+
+        protected const float HEIGHT = 42;
+        protected const float CORNER_RADIUS = 7;
+        protected const float IDLE_SWITCH_WIDTH = 54;
+        protected const float EXPANDED_SWITCH_WIDTH = 70;
+
+        private Colour4 activeColour;
+
+        private Sample? sampleOff;
+        private Sample? sampleOn;
+
+        public ModPanel(Mod mod)
+        {
+            Mod = mod;
+
+            RelativeSizeAxes = Axes.X;
+            Height = 42;
+
+            // all below properties are applied to `Content` rather than the `ModPanel` in its entirety
+            // to allow external components to set these properties on the panel without affecting
+            // its "internal" appearance.
+            Content.Masking = true;
+            Content.CornerRadius = CORNER_RADIUS;
+            Content.BorderThickness = 2;
+            Content.Shear = new Vector2(SHEAR_X, 0);
+
+            Children = new Drawable[]
+            {
+                Background = new Box
+                {
+                    RelativeSizeAxes = Axes.Both
+                },
+                SwitchContainer = new Container
+                {
+                    RelativeSizeAxes = Axes.Y,
+                    Child = new ModSwitchSmall(mod)
+                    {
+                        Anchor = Anchor.Centre,
+                        Origin = Anchor.Centre,
+                        Active = { BindTarget = Active },
+                        Shear = new Vector2(-SHEAR_X, 0),
+                        Scale = new Vector2(HEIGHT / ModSwitchSmall.DEFAULT_SIZE)
+                    }
+                },
+                MainContentContainer = new Container
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Child = new Container
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Masking = true,
+                        CornerRadius = CORNER_RADIUS,
+                        Children = new Drawable[]
+                        {
+                            TextBackground = new Box
+                            {
+                                RelativeSizeAxes = Axes.Both
+                            },
+                            TextFlow = new FillFlowContainer
+                            {
+                                RelativeSizeAxes = Axes.Both,
+                                Padding = new MarginPadding
+                                {
+                                    Horizontal = 17.5f,
+                                    Vertical = 4
+                                },
+                                Direction = FillDirection.Vertical,
+                                Children = new[]
+                                {
+                                    new OsuSpriteText
+                                    {
+                                        Text = mod.Name,
+                                        Font = OsuFont.TorusAlternate.With(size: 18, weight: FontWeight.SemiBold),
+                                        Shear = new Vector2(-SHEAR_X, 0),
+                                        Margin = new MarginPadding
+                                        {
+                                            Left = -18 * SHEAR_X
+                                        }
+                                    },
+                                    new OsuSpriteText
+                                    {
+                                        Text = mod.Description,
+                                        Font = OsuFont.Default.With(size: 12),
+                                        RelativeSizeAxes = Axes.X,
+                                        Truncate = true,
+                                        Shear = new Vector2(-SHEAR_X, 0)
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            };
+
+            Action = Active.Toggle;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(AudioManager audio, OsuColour colours)
+        {
+            sampleOn = audio.Samples.Get(@"UI/check-on");
+            sampleOff = audio.Samples.Get(@"UI/check-off");
+
+            activeColour = colours.ForModType(Mod.Type);
+        }
+
+        protected override HoverSounds CreateHoverSounds(HoverSampleSet sampleSet) => new HoverSounds(sampleSet);
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            Active.BindValueChanged(_ =>
+            {
+                playStateChangeSamples();
+                UpdateState();
+            });
+
+            UpdateState();
+            FinishTransforms(true);
+        }
+
+        private void playStateChangeSamples()
+        {
+            if (Active.Value)
+                sampleOn?.Play();
+            else
+                sampleOff?.Play();
+        }
+
+        protected override bool OnHover(HoverEvent e)
+        {
+            UpdateState();
+            return base.OnHover(e);
+        }
+
+        protected override void OnHoverLost(HoverLostEvent e)
+        {
+            UpdateState();
+            base.OnHoverLost(e);
+        }
+
+        private bool mouseDown;
+
+        protected override bool OnMouseDown(MouseDownEvent e)
+        {
+            if (e.Button == MouseButton.Left)
+                mouseDown = true;
+
+            UpdateState();
+            return true;
+        }
+
+        protected override void OnMouseUp(MouseUpEvent e)
+        {
+            mouseDown = false;
+
+            UpdateState();
+            base.OnMouseUp(e);
+        }
+
+        protected virtual void UpdateState()
+        {
+            float targetWidth = Active.Value ? EXPANDED_SWITCH_WIDTH : IDLE_SWITCH_WIDTH;
+            double transitionDuration = TRANSITION_DURATION;
+
+            Colour4 textBackgroundColour = Active.Value ? activeColour : (Colour4)ColourProvider.Background2;
+            Colour4 mainBackgroundColour = Active.Value ? activeColour.Darken(0.3f) : (Colour4)ColourProvider.Background3;
+            Colour4 textColour = Active.Value ? (Colour4)ColourProvider.Background6 : Colour4.White;
+
+            // Hover affects colour of button background
+            if (IsHovered)
+            {
+                textBackgroundColour = textBackgroundColour.Lighten(0.1f);
+                mainBackgroundColour = mainBackgroundColour.Lighten(0.1f);
+            }
+
+            // Mouse down adds a halfway tween of the movement
+            if (mouseDown)
+            {
+                targetWidth = (float)Interpolation.Lerp(IDLE_SWITCH_WIDTH, EXPANDED_SWITCH_WIDTH, 0.5f);
+                transitionDuration *= 4;
+            }
+
+            Content.TransformTo(nameof(BorderColour), ColourInfo.GradientVertical(mainBackgroundColour, textBackgroundColour), transitionDuration, Easing.OutQuint);
+            Background.FadeColour(mainBackgroundColour, transitionDuration, Easing.OutQuint);
+            SwitchContainer.ResizeWidthTo(targetWidth, transitionDuration, Easing.OutQuint);
+            MainContentContainer.TransformTo(nameof(Padding), new MarginPadding
+            {
+                Left = targetWidth,
+                Right = CORNER_RADIUS
+            }, transitionDuration, Easing.OutQuint);
+            TextBackground.FadeColour(textBackgroundColour, transitionDuration, Easing.OutQuint);
+            TextFlow.FadeColour(textColour, transitionDuration, Easing.OutQuint);
+        }
+    }
+}

osu.Game/Overlays/Music/MusicKeyBindingHandler.cs

@@ -30,17 +30,20 @@ namespace osu.Game.Overlays.Music
         [Resolved(canBeNull: true)]
         private OnScreenDisplay onScreenDisplay { get; set; }
 
+        [Resolved]
+        private OsuGame game { get; set; }
+
         public bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
         {
             if (e.Repeat)
                 return false;
 
-            if (beatmap.Disabled)
-                return false;
-
             switch (e.Action)
             {
                 case GlobalAction.MusicPlay:
+                    if (game.LocalUserPlaying.Value)
+                        return false;
+
                     // use previous state as TogglePause may not update the track's state immediately (state update is run on the audio thread see https://github.com/ppy/osu/issues/9880#issuecomment-674668842)
                     bool wasPlaying = musicController.IsPlaying;
 
@@ -49,11 +52,17 @@ namespace osu.Game.Overlays.Music
                     return true;
 
                 case GlobalAction.MusicNext:
+                    if (beatmap.Disabled)
+                        return false;
+
                     musicController.NextTrack(() => onScreenDisplay?.Display(new MusicActionToast(GlobalActionKeyBindingStrings.MusicNext, e.Action)));
 
                     return true;
 
                 case GlobalAction.MusicPrev:
+                    if (beatmap.Disabled)
+                        return false;
+
                     musicController.PreviousTrack(res =>
                     {
                         switch (res)

osu.Game/Rulesets/AssemblyRulesetStore.cs

@@ -0,0 +1,51 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Platform;
+
+#nullable enable
+
+namespace osu.Game.Rulesets
+{
+    /// <summary>
+    /// A ruleset store that populates from loaded assemblies (and optionally, assemblies in a storage).
+    /// </summary>
+    public class AssemblyRulesetStore : RulesetStore
+    {
+        public override IEnumerable<RulesetInfo> AvailableRulesets => availableRulesets;
+
+        private readonly List<RulesetInfo> availableRulesets = new List<RulesetInfo>();
+
+        /// <summary>
+        /// Create an assembly ruleset store that populates from loaded assemblies and an external location.
+        /// </summary>
+        /// <param name="path">An path containing ruleset DLLs.</param>
+        public AssemblyRulesetStore(string path)
+            : this(new NativeStorage(path))
+        {
+        }
+
+        /// <summary>
+        /// Create an assembly ruleset store that populates from loaded assemblies and an optional storage source.
+        /// </summary>
+        /// <param name="storage">An optional storage containing ruleset DLLs.</param>
+        public AssemblyRulesetStore(Storage? storage = null)
+            : base(storage)
+
+        {
+            List<Ruleset> instances = LoadedAssemblies.Values
+                                                      .Select(r => Activator.CreateInstance(r) as Ruleset)
+                                                      .Where(r => r != null)
+                                                      .Select(r => r.AsNonNull())
+                                                      .ToList();
+
+            // add all legacy rulesets first to ensure they have exclusive choice of primary key.
+            foreach (var r in instances.Where(r => r is ILegacyRuleset))
+                availableRulesets.Add(new RulesetInfo(r.RulesetInfo.ShortName, r.RulesetInfo.Name, r.RulesetInfo.InstantiationInfo, r.RulesetInfo.OnlineID));
+        }
+    }
+}

osu.Game/Rulesets/RealmRulesetStore.cs

@@ -0,0 +1,101 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Logging;
+using osu.Framework.Platform;
+using osu.Game.Database;
+
+#nullable enable
+
+namespace osu.Game.Rulesets
+{
+    public class RealmRulesetStore : RulesetStore
+    {
+        public override IEnumerable<RulesetInfo> AvailableRulesets => availableRulesets;
+
+        private readonly List<RulesetInfo> availableRulesets = new List<RulesetInfo>();
+
+        public RealmRulesetStore(RealmAccess realm, Storage? storage = null)
+            : base(storage)
+        {
+            prepareDetachedRulesets(realm);
+        }
+
+        private void prepareDetachedRulesets(RealmAccess realmAccess)
+        {
+            realmAccess.Write(realm =>
+            {
+                var rulesets = realm.All<RulesetInfo>();
+
+                List<Ruleset> instances = LoadedAssemblies.Values
+                                                          .Select(r => Activator.CreateInstance(r) as Ruleset)
+                                                          .Where(r => r != null)
+                                                          .Select(r => r.AsNonNull())
+                                                          .ToList();
+
+                // add all legacy rulesets first to ensure they have exclusive choice of primary key.
+                foreach (var r in instances.Where(r => r is ILegacyRuleset))
+                {
+                    if (realm.All<RulesetInfo>().FirstOrDefault(rr => rr.OnlineID == r.RulesetInfo.OnlineID) == null)
+                        realm.Add(new RulesetInfo(r.RulesetInfo.ShortName, r.RulesetInfo.Name, r.RulesetInfo.InstantiationInfo, r.RulesetInfo.OnlineID));
+                }
+
+                // add any other rulesets which have assemblies present but are not yet in the database.
+                foreach (var r in instances.Where(r => !(r is ILegacyRuleset)))
+                {
+                    if (rulesets.FirstOrDefault(ri => ri.InstantiationInfo.Equals(r.RulesetInfo.InstantiationInfo, StringComparison.Ordinal)) == null)
+                    {
+                        var existingSameShortName = rulesets.FirstOrDefault(ri => ri.ShortName == r.RulesetInfo.ShortName);
+
+                        if (existingSameShortName != null)
+                        {
+                            // even if a matching InstantiationInfo was not found, there may be an existing ruleset with the same ShortName.
+                            // this generally means the user or ruleset provider has renamed their dll but the underlying ruleset is *likely* the same one.
+                            // in such cases, update the instantiation info of the existing entry to point to the new one.
+                            existingSameShortName.InstantiationInfo = r.RulesetInfo.InstantiationInfo;
+                        }
+                        else
+                            realm.Add(new RulesetInfo(r.RulesetInfo.ShortName, r.RulesetInfo.Name, r.RulesetInfo.InstantiationInfo, r.RulesetInfo.OnlineID));
+                    }
+                }
+
+                List<RulesetInfo> detachedRulesets = new List<RulesetInfo>();
+
+                // perform a consistency check and detach final rulesets from realm for cross-thread runtime usage.
+                foreach (var r in rulesets.OrderBy(r => r.OnlineID))
+                {
+                    try
+                    {
+                        var resolvedType = Type.GetType(r.InstantiationInfo)
+                                           ?? throw new RulesetLoadException(@"Type could not be resolved");
+
+                        var instanceInfo = (Activator.CreateInstance(resolvedType) as Ruleset)?.RulesetInfo
+                                           ?? throw new RulesetLoadException(@"Instantiation failure");
+
+                        // If a ruleset isn't up-to-date with the API, it could cause a crash at an arbitrary point of execution.
+                        // To eagerly handle cases of missing implementations, enumerate all types here and mark as non-available on throw.
+                        resolvedType.Assembly.GetTypes();
+
+                        r.Name = instanceInfo.Name;
+                        r.ShortName = instanceInfo.ShortName;
+                        r.InstantiationInfo = instanceInfo.InstantiationInfo;
+                        r.Available = true;
+
+                        detachedRulesets.Add(r.Clone());
+                    }
+                    catch (Exception ex)
+                    {
+                        r.Available = false;
+                        Logger.Log($"Could not load ruleset {r}: {ex.Message}");
+                    }
+                }
+
+                availableRulesets.AddRange(detachedRulesets.OrderBy(r => r));
+            });
+        }
+    }
+}

osu.Game/Rulesets/RulesetStore.cs

@@ -7,34 +7,26 @@ using System.IO;
 using System.Linq;
 using System.Reflection;
 using osu.Framework;
-using osu.Framework.Extensions.ObjectExtensions;
 using osu.Framework.Logging;
 using osu.Framework.Platform;
-using osu.Game.Database;
 
 #nullable enable
 
 namespace osu.Game.Rulesets
 {
-    public class RulesetStore : IDisposable, IRulesetStore
+    public abstract class RulesetStore : IDisposable, IRulesetStore
     {
-        private readonly RealmAccess realmAccess;
-
         private const string ruleset_library_prefix = @"osu.Game.Rulesets";
 
-        private readonly Dictionary<Assembly, Type> loadedAssemblies = new Dictionary<Assembly, Type>();
+        protected readonly Dictionary<Assembly, Type> LoadedAssemblies = new Dictionary<Assembly, Type>();
 
         /// <summary>
         /// All available rulesets.
         /// </summary>
-        public IEnumerable<RulesetInfo> AvailableRulesets => availableRulesets;
+        public abstract IEnumerable<RulesetInfo> AvailableRulesets { get; }
 
-        private readonly List<RulesetInfo> availableRulesets = new List<RulesetInfo>();
-
-        public RulesetStore(RealmAccess realm, Storage? storage = null)
+        protected RulesetStore(Storage? storage = null)
         {
-            realmAccess = realm;
-
             // On android in release configuration assemblies are loaded from the apk directly into memory.
             // We cannot read assemblies from cwd, so should check loaded assemblies instead.
             loadFromAppDomain();
@@ -53,8 +45,6 @@ namespace osu.Game.Rulesets
             var rulesetStorage = storage?.GetStorageForDirectory(@"rulesets");
             if (rulesetStorage != null)
                 loadUserRulesets(rulesetStorage);
-
-            addMissingRulesets();
         }
 
         /// <summary>
@@ -95,80 +85,7 @@ namespace osu.Game.Rulesets
             if (domainAssembly != null)
                 return domainAssembly;
 
-            return loadedAssemblies.Keys.FirstOrDefault(a => a.FullName == asm.FullName);
-        }
-
-        private void addMissingRulesets()
-        {
-            realmAccess.Write(realm =>
-            {
-                var rulesets = realm.All<RulesetInfo>();
-
-                List<Ruleset> instances = loadedAssemblies.Values
-                                                          .Select(r => Activator.CreateInstance(r) as Ruleset)
-                                                          .Where(r => r != null)
-                                                          .Select(r => r.AsNonNull())
-                                                          .ToList();
-
-                // add all legacy rulesets first to ensure they have exclusive choice of primary key.
-                foreach (var r in instances.Where(r => r is ILegacyRuleset))
-                {
-                    if (realm.All<RulesetInfo>().FirstOrDefault(rr => rr.OnlineID == r.RulesetInfo.OnlineID) == null)
-                        realm.Add(new RulesetInfo(r.RulesetInfo.ShortName, r.RulesetInfo.Name, r.RulesetInfo.InstantiationInfo, r.RulesetInfo.OnlineID));
-                }
-
-                // add any other rulesets which have assemblies present but are not yet in the database.
-                foreach (var r in instances.Where(r => !(r is ILegacyRuleset)))
-                {
-                    if (rulesets.FirstOrDefault(ri => ri.InstantiationInfo.Equals(r.RulesetInfo.InstantiationInfo, StringComparison.Ordinal)) == null)
-                    {
-                        var existingSameShortName = rulesets.FirstOrDefault(ri => ri.ShortName == r.RulesetInfo.ShortName);
-
-                        if (existingSameShortName != null)
-                        {
-                            // even if a matching InstantiationInfo was not found, there may be an existing ruleset with the same ShortName.
-                            // this generally means the user or ruleset provider has renamed their dll but the underlying ruleset is *likely* the same one.
-                            // in such cases, update the instantiation info of the existing entry to point to the new one.
-                            existingSameShortName.InstantiationInfo = r.RulesetInfo.InstantiationInfo;
-                        }
-                        else
-                            realm.Add(new RulesetInfo(r.RulesetInfo.ShortName, r.RulesetInfo.Name, r.RulesetInfo.InstantiationInfo, r.RulesetInfo.OnlineID));
-                    }
-                }
-
-                List<RulesetInfo> detachedRulesets = new List<RulesetInfo>();
-
-                // perform a consistency check and detach final rulesets from realm for cross-thread runtime usage.
-                foreach (var r in rulesets.OrderBy(r => r.OnlineID))
-                {
-                    try
-                    {
-                        var resolvedType = Type.GetType(r.InstantiationInfo)
-                                           ?? throw new RulesetLoadException(@"Type could not be resolved");
-
-                        var instanceInfo = (Activator.CreateInstance(resolvedType) as Ruleset)?.RulesetInfo
-                                           ?? throw new RulesetLoadException(@"Instantiation failure");
-
-                        // If a ruleset isn't up-to-date with the API, it could cause a crash at an arbitrary point of execution.
-                        // To eagerly handle cases of missing implementations, enumerate all types here and mark as non-available on throw.
-                        resolvedType.Assembly.GetTypes();
-
-                        r.Name = instanceInfo.Name;
-                        r.ShortName = instanceInfo.ShortName;
-                        r.InstantiationInfo = instanceInfo.InstantiationInfo;
-                        r.Available = true;
-
-                        detachedRulesets.Add(r.Clone());
-                    }
-                    catch (Exception ex)
-                    {
-                        r.Available = false;
-                        Logger.Log($"Could not load ruleset {r}: {ex.Message}");
-                    }
-                }
-
-                availableRulesets.AddRange(detachedRulesets.OrderBy(r => r));
-            });
+            return LoadedAssemblies.Keys.FirstOrDefault(a => a.FullName == asm.FullName);
         }
 
         private void loadFromAppDomain()
@@ -214,7 +131,7 @@ namespace osu.Game.Rulesets
         {
             string? filename = Path.GetFileNameWithoutExtension(file);
 
-            if (loadedAssemblies.Values.Any(t => Path.GetFileNameWithoutExtension(t.Assembly.Location) == filename))
+            if (LoadedAssemblies.Values.Any(t => Path.GetFileNameWithoutExtension(t.Assembly.Location) == filename))
                 return;
 
             try
@@ -229,17 +146,17 @@ namespace osu.Game.Rulesets
 
         private void addRuleset(Assembly assembly)
         {
-            if (loadedAssemblies.ContainsKey(assembly))
+            if (LoadedAssemblies.ContainsKey(assembly))
                 return;
 
             // the same assembly may be loaded twice in the same AppDomain (currently a thing in certain Rider versions https://youtrack.jetbrains.com/issue/RIDER-48799).
             // as a failsafe, also compare by FullName.
-            if (loadedAssemblies.Any(a => a.Key.FullName == assembly.FullName))
+            if (LoadedAssemblies.Any(a => a.Key.FullName == assembly.FullName))
                 return;
 
             try
             {
-                loadedAssemblies[assembly] = assembly.GetTypes().First(t => t.IsPublic && t.IsSubclassOf(typeof(Ruleset)));
+                LoadedAssemblies[assembly] = assembly.GetTypes().First(t => t.IsPublic && t.IsSubclassOf(typeof(Ruleset)));
             }
             catch (Exception e)
             {

osu.Game/Rulesets/UI/ModSwitchSmall.cs

@@ -0,0 +1,109 @@
+// 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.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Utils;
+using osu.Game.Graphics;
+using osu.Game.Overlays;
+using osu.Game.Rulesets.Mods;
+using osuTK;
+using osuTK.Graphics;
+
+#nullable enable
+
+namespace osu.Game.Rulesets.UI
+{
+    public class ModSwitchSmall : CompositeDrawable
+    {
+        public BindableBool Active { get; } = new BindableBool();
+
+        public const float DEFAULT_SIZE = 60;
+
+        private readonly IMod mod;
+
+        private readonly SpriteIcon background;
+        private readonly SpriteIcon? modIcon;
+
+        private Color4 activeForegroundColour;
+        private Color4 inactiveForegroundColour;
+
+        private Color4 activeBackgroundColour;
+        private Color4 inactiveBackgroundColour;
+
+        public ModSwitchSmall(IMod mod)
+        {
+            this.mod = mod;
+
+            AutoSizeAxes = Axes.Both;
+
+            FillFlowContainer contentFlow;
+            ModSwitchTiny tinySwitch;
+
+            InternalChildren = new Drawable[]
+            {
+                background = new SpriteIcon
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(DEFAULT_SIZE),
+                    Icon = OsuIcon.ModBg
+                },
+                contentFlow = new FillFlowContainer
+                {
+                    AutoSizeAxes = Axes.Both,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Spacing = new Vector2(0, 4),
+                    Direction = FillDirection.Vertical,
+                    Child = tinySwitch = new ModSwitchTiny(mod)
+                    {
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+                        Scale = new Vector2(0.6f),
+                        Active = { BindTarget = Active }
+                    }
+                }
+            };
+
+            if (mod.Icon != null)
+            {
+                contentFlow.Insert(-1, modIcon = new SpriteIcon
+                {
+                    Anchor = Anchor.TopCentre,
+                    Origin = Anchor.TopCentre,
+                    Size = new Vector2(21),
+                    Icon = mod.Icon.Value
+                });
+                tinySwitch.Scale = new Vector2(0.3f);
+            }
+        }
+
+        [BackgroundDependencyLoader(true)]
+        private void load(OsuColour colours, OverlayColourProvider? colourProvider)
+        {
+            inactiveForegroundColour = colourProvider?.Background5 ?? colours.Gray3;
+            activeForegroundColour = colours.ForModType(mod.Type);
+
+            inactiveBackgroundColour = colourProvider?.Background2 ?? colours.Gray5;
+            activeBackgroundColour = Interpolation.ValueAt<Colour4>(0.1f, Colour4.Black, activeForegroundColour, 0, 1);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            Active.BindValueChanged(_ => updateState(), true);
+            FinishTransforms(true);
+        }
+
+        private void updateState()
+        {
+            modIcon?.FadeColour(Active.Value ? activeForegroundColour : inactiveForegroundColour, 200, Easing.OutQuint);
+            background.FadeColour(Active.Value ? activeBackgroundColour : inactiveBackgroundColour, 200, Easing.OutQuint);
+        }
+    }
+}

osu.Game/Rulesets/UI/ModSwitchTiny.cs

@@ -0,0 +1,93 @@
+// 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.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Utils;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Overlays;
+using osu.Game.Rulesets.Mods;
+using osuTK;
+using osuTK.Graphics;
+
+#nullable enable
+
+namespace osu.Game.Rulesets.UI
+{
+    public class ModSwitchTiny : CompositeDrawable
+    {
+        public BindableBool Active { get; } = new BindableBool();
+
+        public const float DEFAULT_HEIGHT = 30;
+
+        private readonly IMod mod;
+
+        private readonly Box background;
+        private readonly OsuSpriteText acronymText;
+
+        private Color4 activeForegroundColour;
+        private Color4 inactiveForegroundColour;
+
+        private Color4 activeBackgroundColour;
+        private Color4 inactiveBackgroundColour;
+
+        public ModSwitchTiny(IMod mod)
+        {
+            this.mod = mod;
+            Size = new Vector2(73, DEFAULT_HEIGHT);
+
+            InternalChild = new CircularContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                Masking = true,
+                Children = new Drawable[]
+                {
+                    background = new Box
+                    {
+                        RelativeSizeAxes = Axes.Both
+                    },
+                    acronymText = new OsuSpriteText
+                    {
+                        Anchor = Anchor.Centre,
+                        Origin = Anchor.Centre,
+                        Shadow = false,
+                        Font = OsuFont.Numeric.With(size: 24, weight: FontWeight.Black),
+                        Text = mod.Acronym,
+                        Margin = new MarginPadding
+                        {
+                            Top = 4
+                        }
+                    }
+                }
+            };
+        }
+
+        [BackgroundDependencyLoader(true)]
+        private void load(OsuColour colours, OverlayColourProvider? colourProvider)
+        {
+            inactiveBackgroundColour = colourProvider?.Background5 ?? colours.Gray3;
+            activeBackgroundColour = colours.ForModType(mod.Type);
+
+            inactiveForegroundColour = colourProvider?.Background2 ?? colours.Gray5;
+            activeForegroundColour = Interpolation.ValueAt<Colour4>(0.1f, Colour4.Black, activeForegroundColour, 0, 1);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            Active.BindValueChanged(_ => updateState(), true);
+            FinishTransforms(true);
+        }
+
+        private void updateState()
+        {
+            acronymText.FadeColour(Active.Value ? activeForegroundColour : inactiveForegroundColour, 200, Easing.OutQuint);
+            background.FadeColour(Active.Value ? activeBackgroundColour : inactiveBackgroundColour, 200, Easing.OutQuint);
+        }
+    }
+}

osu.Game/Screens/Menu/MainMenu.cs

@@ -2,15 +2,19 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Diagnostics;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Framework.Input.Bindings;
+using osu.Framework.Input.Events;
 using osu.Framework.Platform;
 using osu.Framework.Screens;
 using osu.Game.Beatmaps;
 using osu.Game.Configuration;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
+using osu.Game.Input.Bindings;
 using osu.Game.IO;
 using osu.Game.Online.API;
 using osu.Game.Overlays;
@@ -25,7 +29,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Screens.Menu
 {
-    public class MainMenu : OsuScreen, IHandlePresentBeatmap
+    public class MainMenu : OsuScreen, IHandlePresentBeatmap, IKeyBindingHandler<GlobalAction>
     {
         public const float FADE_IN_DURATION = 300;
 
@@ -297,5 +301,26 @@ namespace osu.Game.Screens.Menu
 
             Schedule(loadSoloSongSelect);
         }
+
+        public bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
+        {
+            if (e.Repeat)
+                return false;
+
+            switch (e.Action)
+            {
+                case GlobalAction.Back:
+                    // In the case of a host being able to exit, the back action is handled by ExitConfirmOverlay.
+                    Debug.Assert(!host.CanExit);
+
+                    return host.SuspendToBackground();
+            }
+
+            return false;
+        }
+
+        public void OnReleased(KeyBindingReleaseEvent<GlobalAction> e)
+        {
+        }
     }
 }

osu.Game/Screens/OnlinePlay/Components/OnlinePlayBackgroundSprite.cs

@@ -23,6 +23,7 @@ namespace osu.Game.Screens.OnlinePlay.Components
         {
             InternalChild = sprite = CreateBackgroundSprite();
 
+            CurrentPlaylistItem.BindValueChanged(_ => updateBeatmap());
             Playlist.CollectionChanged += (_, __) => updateBeatmap();
 
             updateBeatmap();
@@ -30,7 +31,7 @@ namespace osu.Game.Screens.OnlinePlay.Components
 
         private void updateBeatmap()
         {
-            sprite.Beatmap.Value = Playlist.GetCurrentItem()?.Beatmap;
+            sprite.Beatmap.Value = CurrentPlaylistItem.Value?.Beatmap ?? Playlist.GetCurrentItem()?.Beatmap;
         }
 
         protected virtual UpdateableBeatmapBackgroundSprite CreateBackgroundSprite() => new UpdateableBeatmapBackgroundSprite(BeatmapSetCoverType) { RelativeSizeAxes = Axes.Both };

osu.Game/Screens/OnlinePlay/Components/StarRatingRangeDisplay.cs

@@ -2,7 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using System.Collections.Specialized;
 using System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -75,15 +74,29 @@ namespace osu.Game.Screens.OnlinePlay.Components
         {
             base.LoadComplete();
 
-            Playlist.BindCollectionChanged(updateRange, true);
+            DifficultyRange.BindValueChanged(_ => updateRange());
+            Playlist.BindCollectionChanged((_, __) => updateRange(), true);
         }
 
-        private void updateRange(object sender, NotifyCollectionChangedEventArgs e)
+        private void updateRange()
         {
-            var orderedDifficulties = Playlist.Select(p => p.Beatmap).OrderBy(b => b.StarRating).ToArray();
+            StarDifficulty minDifficulty;
+            StarDifficulty maxDifficulty;
 
-            StarDifficulty minDifficulty = new StarDifficulty(orderedDifficulties.Length > 0 ? orderedDifficulties[0].StarRating : 0, 0);
-            StarDifficulty maxDifficulty = new StarDifficulty(orderedDifficulties.Length > 0 ? orderedDifficulties[^1].StarRating : 0, 0);
+            if (DifficultyRange.Value != null)
+            {
+                minDifficulty = new StarDifficulty(DifficultyRange.Value.Min, 0);
+                maxDifficulty = new StarDifficulty(DifficultyRange.Value.Max, 0);
+            }
+            else
+            {
+                // In multiplayer rooms, the beatmaps of playlist items will not be populated to a point this can be correct.
+                // Either populating them via BeatmapLookupCache or polling the API for the room's DifficultyRange will be required.
+                var orderedDifficulties = Playlist.Select(p => p.Beatmap).OrderBy(b => b.StarRating).ToArray();
+
+                minDifficulty = new StarDifficulty(orderedDifficulties.Length > 0 ? orderedDifficulties[0].StarRating : 0, 0);
+                maxDifficulty = new StarDifficulty(orderedDifficulties.Length > 0 ? orderedDifficulties[^1].StarRating : 0, 0);
+            }
 
             minDisplay.Current.Value = minDifficulty;
             maxDisplay.Current.Value = maxDifficulty;

osu.Game/Screens/OnlinePlay/Lounge/Components/DrawableRoom.cs

@@ -388,7 +388,7 @@ namespace osu.Game.Screens.OnlinePlay.Lounge.Components
             protected override void LoadComplete()
             {
                 base.LoadComplete();
-                SelectedItem.BindValueChanged(onSelectedItemChanged, true);
+                CurrentPlaylistItem.BindValueChanged(onSelectedItemChanged, true);
             }
 
             private CancellationTokenSource beatmapLookupCancellation;

osu.Game/Screens/OnlinePlay/Lounge/Components/PlaylistCountPill.cs

@@ -1,7 +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.Collections.Specialized;
+using System.Linq;
 using Humanizer;
 using osu.Framework.Allocation;
 using osu.Framework.Extensions.LocalisationExtensions;
@@ -41,15 +41,22 @@ namespace osu.Game.Screens.OnlinePlay.Lounge.Components
         {
             base.LoadComplete();
 
-            Playlist.BindCollectionChanged(updateCount, true);
+            PlaylistItemStats.BindValueChanged(_ => updateCount());
+            Playlist.BindCollectionChanged((_, __) => updateCount(), true);
         }
 
-        private void updateCount(object sender, NotifyCollectionChangedEventArgs e)
+        private void updateCount()
         {
+            int activeItems = Playlist.Count > 0 || PlaylistItemStats.Value == null
+                // For now, use the playlist as the source of truth if it has any items.
+                // This allows the count to display correctly on the room screen (after joining a room).
+                ? Playlist.Count(i => !i.Expired)
+                : PlaylistItemStats.Value.CountActive;
+
             count.Clear();
-            count.AddText(Playlist.Count.ToLocalisableString(), s => s.Font = s.Font.With(weight: FontWeight.Bold));
+            count.AddText(activeItems.ToLocalisableString(), s => s.Font = s.Font.With(weight: FontWeight.Bold));
             count.AddText(" ");
-            count.AddText("Beatmap".ToQuantity(Playlist.Count, ShowQuantityAs.None));
+            count.AddText("Beatmap".ToQuantity(activeItems, ShowQuantityAs.None));
         }
     }
 }

osu.Game/Screens/OnlinePlay/Lounge/Components/RoomsContainer.cs

@@ -77,7 +77,7 @@ namespace osu.Game.Screens.OnlinePlay.Lounge.Components
                 {
                     bool matchingFilter = true;
 
-                    matchingFilter &= r.Room.Playlist.Count == 0 || criteria.Ruleset == null || r.Room.Playlist.Any(i => i.RulesetID == criteria.Ruleset.OnlineID);
+                    matchingFilter &= criteria.Ruleset == null || r.Room.PlaylistItemStats.Value?.RulesetIDs.Any(id => id == criteria.Ruleset.OnlineID) != false;
 
                     if (!string.IsNullOrEmpty(criteria.SearchString))
                         matchingFilter &= r.FilterTerms.Any(term => term.Contains(criteria.SearchString, StringComparison.InvariantCultureIgnoreCase));

osu.Game/Screens/OnlinePlay/Multiplayer/GameplayChatDisplay.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 JetBrains.Annotations;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -15,10 +16,11 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer
 {
     public class GameplayChatDisplay : MatchChatDisplay, IKeyBindingHandler<GlobalAction>
     {
-        [Resolved]
+        [Resolved(CanBeNull = true)]
+        [CanBeNull]
         private ILocalUserPlayInfo localUserInfo { get; set; }
 
-        private IBindable<bool> localUserPlaying = new Bindable<bool>();
+        private readonly IBindable<bool> localUserPlaying = new Bindable<bool>();
 
         public override bool PropagatePositionalInputSubTree => !localUserPlaying.Value;
 
@@ -46,7 +48,9 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer
         {
             base.LoadComplete();
 
-            localUserPlaying = localUserInfo.IsPlaying.GetBoundCopy();
+            if (localUserInfo != null)
+                localUserPlaying.BindTo(localUserInfo.IsPlaying);
+
             localUserPlaying.BindValueChanged(playing =>
             {
                 // for now let's never hold focus. this avoid misdirected gameplay keys entering chat.

osu.Game/Screens/OnlinePlay/Multiplayer/Match/MultiplayerMatchSettingsOverlay.cs

@@ -343,7 +343,7 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Match
                 base.LoadComplete();
 
                 drawablePlaylist.Items.BindTo(Playlist);
-                drawablePlaylist.SelectedItem.BindTo(SelectedItem);
+                drawablePlaylist.SelectedItem.BindTo(CurrentPlaylistItem);
             }
 
             protected override void Update()
@@ -419,7 +419,7 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Match
                 if (text.StartsWith(not_found_prefix, StringComparison.Ordinal))
                 {
                     ErrorText.Text = "The selected beatmap is not available online.";
-                    SelectedItem.Value.MarkInvalid();
+                    CurrentPlaylistItem.Value.MarkInvalid();
                 }
                 else
                 {

osu.Game/Screens/OnlinePlay/Multiplayer/Match/MultiplayerReadyButton.cs

@@ -67,7 +67,7 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Match
         {
             base.LoadComplete();
 
-            SelectedItem.BindValueChanged(_ => updateState());
+            CurrentPlaylistItem.BindValueChanged(_ => updateState());
         }
 
         protected override void OnRoomUpdated()
@@ -111,7 +111,7 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Match
 
             bool enableButton =
                 Room?.State == MultiplayerRoomState.Open
-                && SelectedItem.Value?.ID == Room.Settings.PlaylistItemId
+                && CurrentPlaylistItem.Value?.ID == Room.Settings.PlaylistItemId
                 && !Room.Playlist.Single(i => i.ID == Room.Settings.PlaylistItemId).Expired
                 && !operationInProgress.Value;
 

osu.Game/Screens/OnlinePlay/Multiplayer/Match/Playlist/MultiplayerPlaylist.cs

@@ -52,14 +52,14 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Match.Playlist
                         queueList = new MultiplayerQueueList
                         {
                             RelativeSizeAxes = Axes.Both,
-                            SelectedItem = { BindTarget = SelectedItem },
+                            SelectedItem = { BindTarget = CurrentPlaylistItem },
                             RequestEdit = item => RequestEdit?.Invoke(item)
                         },
                         historyList = new MultiplayerHistoryList
                         {
                             RelativeSizeAxes = Axes.Both,
                             Alpha = 0,
-                            SelectedItem = { BindTarget = SelectedItem }
+                            SelectedItem = { BindTarget = CurrentPlaylistItem }
                         }
                     }
                 }

osu.Game/Screens/OnlinePlay/Multiplayer/MultiplayerMatchSubScreen.cs

@@ -449,7 +449,7 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer
             switch (client.LocalUser.State)
             {
                 case MultiplayerUserState.Spectating:
-                    return new MultiSpectatorScreen(users.Take(PlayerGrid.MAX_PLAYERS).ToArray());
+                    return new MultiSpectatorScreen(Room, users.Take(PlayerGrid.MAX_PLAYERS).ToArray());
 
                 default:
                     return new MultiplayerPlayerLoader(() => new MultiplayerPlayer(Room, SelectedItem.Value, users));

osu.Game/Screens/OnlinePlay/Multiplayer/Spectate/MultiSpectatorScreen.cs

@@ -11,10 +11,13 @@ using osu.Framework.Graphics.Containers;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics;
 using osu.Game.Online.Multiplayer;
+using osu.Game.Online.Rooms;
 using osu.Game.Online.Spectator;
 using osu.Game.Screens.Play;
 using osu.Game.Screens.Play.HUD;
 using osu.Game.Screens.Spectate;
+using osu.Game.Users;
+using osuTK;
 
 namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
 {
@@ -34,6 +37,8 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
         /// </summary>
         public bool AllPlayersLoaded => instances.All(p => p?.PlayerLoaded == true);
 
+        protected override UserActivity InitialActivity => new UserActivity.SpectatingMultiplayerGame(Beatmap.Value.BeatmapInfo, Ruleset.Value);
+
         [Resolved]
         private OsuColour colours { get; set; }
 
@@ -48,15 +53,18 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
         private PlayerArea currentAudioSource;
         private bool canStartMasterClock;
 
+        private readonly Room room;
         private readonly MultiplayerRoomUser[] users;
 
         /// <summary>
         /// Creates a new <see cref="MultiSpectatorScreen"/>.
         /// </summary>
+        /// <param name="room">The room.</param>
         /// <param name="users">The players to spectate.</param>
-        public MultiSpectatorScreen(MultiplayerRoomUser[] users)
+        public MultiSpectatorScreen(Room room, MultiplayerRoomUser[] users)
             : base(users.Select(u => u.UserID).ToArray())
         {
+            this.room = room;
             this.users = users;
 
             instances = new PlayerArea[Users.Count];
@@ -65,7 +73,7 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
         [BackgroundDependencyLoader]
         private void load()
         {
-            Container leaderboardContainer;
+            FillFlowContainer leaderboardFlow;
             Container scoreDisplayContainer;
 
             masterClockContainer = CreateMasterGameplayClockContainer(Beatmap.Value);
@@ -97,10 +105,13 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
                                 {
                                     new Drawable[]
                                     {
-                                        leaderboardContainer = new Container
+                                        leaderboardFlow = new FillFlowContainer
                                         {
-                                            RelativeSizeAxes = Axes.Y,
-                                            AutoSizeAxes = Axes.X
+                                            Anchor = Anchor.CentreLeft,
+                                            Origin = Anchor.CentreLeft,
+                                            AutoSizeAxes = Axes.Both,
+                                            Direction = FillDirection.Vertical,
+                                            Spacing = new Vector2(5)
                                         },
                                         grid = new PlayerGrid { RelativeSizeAxes = Axes.Both }
                                     }
@@ -125,14 +136,12 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
             LoadComponentAsync(leaderboard = new MultiSpectatorLeaderboard(scoreProcessor, users)
             {
                 Expanded = { Value = true },
-                Anchor = Anchor.CentreLeft,
-                Origin = Anchor.CentreLeft,
             }, l =>
             {
                 foreach (var instance in instances)
                     leaderboard.AddClock(instance.UserId, instance.GameplayClock);
 
-                leaderboardContainer.Add(leaderboard);
+                leaderboardFlow.Insert(0, leaderboard);
 
                 if (leaderboard.TeamScores.Count == 2)
                 {
@@ -143,6 +152,11 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
                     }, scoreDisplayContainer.Add);
                 }
             });
+
+            LoadComponentAsync(new GameplayChatDisplay(room)
+            {
+                Expanded = { Value = true },
+            }, chat => leaderboardFlow.Insert(1, chat));
         }
 
         protected override void LoadComplete()

osu.Game/Screens/OnlinePlay/OnlinePlayComposite.cs

@@ -32,9 +32,22 @@ namespace osu.Game.Screens.OnlinePlay
         [Resolved(typeof(Room))]
         protected Bindable<MatchType> Type { get; private set; }
 
+        /// <summary>
+        /// The currently selected item in the <see cref="RoomSubScreen"/>, or the current item from <see cref="Playlist"/>
+        /// if this <see cref="OnlinePlayComposite"/> is not within a <see cref="RoomSubScreen"/>.
+        /// </summary>
+        [Resolved(typeof(Room))]
+        protected Bindable<PlaylistItem> CurrentPlaylistItem { get; private set; }
+
+        [Resolved(typeof(Room))]
+        protected Bindable<Room.RoomPlaylistItemStats> PlaylistItemStats { get; private set; }
+
         [Resolved(typeof(Room))]
         protected BindableList<PlaylistItem> Playlist { get; private set; }
 
+        [Resolved(typeof(Room))]
+        protected Bindable<Room.RoomDifficultyRange> DifficultyRange { get; private set; }
+
         [Resolved(typeof(Room))]
         protected Bindable<RoomCategory> Category { get; private set; }
 
@@ -71,12 +84,6 @@ namespace osu.Game.Screens.OnlinePlay
         [Resolved(CanBeNull = true)]
         private IBindable<PlaylistItem> subScreenSelectedItem { get; set; }
 
-        /// <summary>
-        /// The currently selected item in the <see cref="RoomSubScreen"/>, or the current item from <see cref="Playlist"/>
-        /// if this <see cref="OnlinePlayComposite"/> is not within a <see cref="RoomSubScreen"/>.
-        /// </summary>
-        protected readonly Bindable<PlaylistItem> SelectedItem = new Bindable<PlaylistItem>();
-
         protected override void LoadComplete()
         {
             base.LoadComplete();
@@ -85,9 +92,13 @@ namespace osu.Game.Screens.OnlinePlay
             Playlist.BindCollectionChanged((_, __) => UpdateSelectedItem(), true);
         }
 
-        protected virtual void UpdateSelectedItem()
-            => SelectedItem.Value = RoomID.Value == null || subScreenSelectedItem == null
-                ? Playlist.GetCurrentItem()
-                : subScreenSelectedItem.Value;
+        protected void UpdateSelectedItem()
+        {
+            // null room ID means this is a room in the process of being created.
+            if (RoomID.Value == null)
+                CurrentPlaylistItem.Value = Playlist.GetCurrentItem();
+            else if (subScreenSelectedItem != null)
+                CurrentPlaylistItem.Value = subScreenSelectedItem.Value;
+        }
     }
 }

osu.Game/Screens/OnlinePlay/Playlists/PlaylistsPlayer.cs

@@ -9,7 +9,6 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Screens;
 using osu.Game.Extensions;
-using osu.Game.Online.API;
 using osu.Game.Online.Rooms;
 using osu.Game.Rulesets;
 using osu.Game.Scoring;
@@ -40,8 +39,8 @@ namespace osu.Game.Screens.OnlinePlay.Playlists
             if (ruleset.Value.OnlineID != PlaylistItem.RulesetID)
                 throw new InvalidOperationException("Current Ruleset does not match PlaylistItem's Ruleset");
 
-            var localMods = Mods.Value.Select(m => new APIMod(m)).ToArray();
-            if (!PlaylistItem.RequiredMods.All(m => localMods.Any(m.Equals)))
+            var requiredLocalMods = PlaylistItem.RequiredMods.Select(m => m.ToMod(GameplayState.Ruleset));
+            if (!requiredLocalMods.All(m => Mods.Value.Any(m.Equals)))
                 throw new InvalidOperationException("Current Mods do not match PlaylistItem's RequiredMods");
         }
 

osu.Game/Tests/Visual/OnlinePlay/TestRoomManager.cs

@@ -43,6 +43,11 @@ namespace osu.Game.Tests.Visual.OnlinePlay
 
                 if (ruleset != null)
                 {
+                    room.PlaylistItemStats.Value = new Room.RoomPlaylistItemStats
+                    {
+                        RulesetIDs = new[] { ruleset.OnlineID },
+                    };
+
                     room.Playlist.Add(new PlaylistItem(new BeatmapInfo { Metadata = new BeatmapMetadata() })
                     {
                         RulesetID = ruleset.OnlineID,

osu.Game/Tests/Visual/SkinnableTestScene.cs

@@ -43,7 +43,7 @@ namespace osu.Game.Tests.Visual
         [BackgroundDependencyLoader]
         private void load()
         {
-            var dllStore = new DllResourceStore(DynamicCompilationOriginal.GetType().Assembly);
+            var dllStore = new DllResourceStore(GetType().Assembly);
 
             metricsSkin = new TestLegacySkin(new SkinInfo { Name = "metrics-skin" }, new NamespacedResourceStore<byte[]>(dllStore, "Resources/metrics_skin"), this, true);
             defaultSkin = new DefaultLegacySkin(this);

osu.Game/Users/UserActivity.cs

@@ -50,6 +50,16 @@ namespace osu.Game.Users
             public override string Status => $@"{base.Status} with others";
         }
 
+        public class SpectatingMultiplayerGame : InGame
+        {
+            public SpectatingMultiplayerGame(IBeatmapInfo beatmapInfo, IRulesetInfo ruleset)
+                : base(beatmapInfo, ruleset)
+            {
+            }
+
+            public override string Status => $"Watching others {base.Status.ToLowerInvariant()}";
+        }
+
         public class InPlaylistGame : InGame
         {
             public InPlaylistGame(IBeatmapInfo beatmapInfo, IRulesetInfo ruleset)

osu.Game/osu.Game.csproj

@@ -36,7 +36,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Realm" Version="10.9.0" />
-    <PackageReference Include="ppy.osu.Framework" Version="2022.217.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2022.223.0" />
     <PackageReference Include="ppy.osu.Game.Resources" Version="2022.211.0" />
     <PackageReference Include="Sentry" Version="3.14.0" />
     <PackageReference Include="SharpCompress" Version="0.30.1" />

osu.iOS.props

@@ -60,7 +60,7 @@
     <Reference Include="System.Net.Http" />
   </ItemGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="ppy.osu.Framework.iOS" Version="2022.217.0" />
+    <PackageReference Include="ppy.osu.Framework.iOS" Version="2022.223.0" />
     <PackageReference Include="ppy.osu.Game.Resources" Version="2022.211.0" />
   </ItemGroup>
   <!-- See https://github.com/dotnet/runtime/issues/35988 (can be removed after Xamarin uses net6.0) -->
@@ -83,7 +83,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="5.0.14" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite.Core" Version="5.0.14" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-    <PackageReference Include="ppy.osu.Framework" Version="2022.217.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2022.223.0" />
     <PackageReference Include="SharpCompress" Version="0.30.1" />
     <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />