diff --git a/.github/workflows/diffcalc.yml b/.github/workflows/diffcalc.yml
index 9e11ab6663..d84482a681 100644
--- a/.github/workflows/diffcalc.yml
+++ b/.github/workflows/diffcalc.yml
@@ -30,15 +30,6 @@ jobs:
           if [[ "${{ github.event.comment.body }}" =~ "osu" ]] ; then
             MATRIX_PROJECTS_JSON+='{ "name": "osu", "id": 0 },'
           fi
-          if [[ "${{ github.event.comment.body }}" =~ "taiko" ]] ; then
-            MATRIX_PROJECTS_JSON+='{ "name": "taiko", "id": 1 },'
-          fi
-          if [[ "${{ github.event.comment.body }}" =~ "catch" ]] ; then
-            MATRIX_PROJECTS_JSON+='{ "name": "catch", "id": 2 },'
-          fi
-          if [[ "${{ github.event.comment.body }}" =~ "mania" ]] ; then
-            MATRIX_PROJECTS_JSON+='{ "name": "mania", "id": 3 },'
-          fi
 
           if [[ "${MATRIX_PROJECTS_JSON}" != "" ]]; then
             MATRIX_JSON="{ \"ruleset\": [ ${MATRIX_PROJECTS_JSON} ] }"
diff --git a/osu.Android.slnf b/osu.Android.slnf
index 7d90f97eb9..9ae70a1a77 100644
--- a/osu.Android.slnf
+++ b/osu.Android.slnf
@@ -3,14 +3,8 @@
     "path": "osu.sln",
     "projects": [
       "osu.Android\\osu.Android.csproj",
-      "osu.Game.Rulesets.Catch.Tests.Android\\osu.Game.Rulesets.Catch.Tests.Android.csproj",
-      "osu.Game.Rulesets.Catch\\osu.Game.Rulesets.Catch.csproj",
-      "osu.Game.Rulesets.Mania.Tests.Android\\osu.Game.Rulesets.Mania.Tests.Android.csproj",
-      "osu.Game.Rulesets.Mania\\osu.Game.Rulesets.Mania.csproj",
       "osu.Game.Rulesets.Osu.Tests.Android\\osu.Game.Rulesets.Osu.Tests.Android.csproj",
       "osu.Game.Rulesets.Osu\\osu.Game.Rulesets.Osu.csproj",
-      "osu.Game.Rulesets.Taiko.Tests.Android\\osu.Game.Rulesets.Taiko.Tests.Android.csproj",
-      "osu.Game.Rulesets.Taiko\\osu.Game.Rulesets.Taiko.csproj",
       "osu.Game.Tests.Android\\osu.Game.Tests.Android.csproj",
       "osu.Game.Tests\\osu.Game.Tests.csproj",
       "osu.Game\\osu.Game.csproj"
diff --git a/osu.Desktop.slnf b/osu.Desktop.slnf
index 503e5935f5..41a588079a 100644
--- a/osu.Desktop.slnf
+++ b/osu.Desktop.slnf
@@ -4,14 +4,8 @@
     "projects": [
       "osu.Desktop\\osu.Desktop.csproj",
       "osu.Game.Benchmarks\\osu.Game.Benchmarks.csproj",
-      "osu.Game.Rulesets.Catch.Tests\\osu.Game.Rulesets.Catch.Tests.csproj",
-      "osu.Game.Rulesets.Catch\\osu.Game.Rulesets.Catch.csproj",
-      "osu.Game.Rulesets.Mania.Tests\\osu.Game.Rulesets.Mania.Tests.csproj",
-      "osu.Game.Rulesets.Mania\\osu.Game.Rulesets.Mania.csproj",
       "osu.Game.Rulesets.Osu.Tests\\osu.Game.Rulesets.Osu.Tests.csproj",
       "osu.Game.Rulesets.Osu\\osu.Game.Rulesets.Osu.csproj",
-      "osu.Game.Rulesets.Taiko.Tests\\osu.Game.Rulesets.Taiko.Tests.csproj",
-      "osu.Game.Rulesets.Taiko\\osu.Game.Rulesets.Taiko.csproj",
       "osu.Game.Tests\\osu.Game.Tests.csproj",
       "osu.Game.Tournament.Tests\\osu.Game.Tournament.Tests.csproj",
       "osu.Game.Tournament\\osu.Game.Tournament.csproj",
diff --git a/osu.Game.Rulesets.Osu.Tests.iOS/AppDelegate.cs b/osu.Game.Rulesets.Osu.Tests.iOS/AppDelegate.cs
index 01e635f09c..462f73b816 100644
--- a/osu.Game.Rulesets.Osu.Tests.iOS/AppDelegate.cs
+++ b/osu.Game.Rulesets.Osu.Tests.iOS/AppDelegate.cs
@@ -1,10 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using Foundation;
-using osu.Framework.iOS;
-using osu.Game.Tests;
-
 namespace osu.Game.Rulesets.Osu.Tests.iOS
 {
     [Register("AppDelegate")]
diff --git a/osu.Game.Rulesets.Osu.Tests.iOS/Application.cs b/osu.Game.Rulesets.Osu.Tests.iOS/Application.cs
index be38a883d7..34ee26798d 100644
--- a/osu.Game.Rulesets.Osu.Tests.iOS/Application.cs
+++ b/osu.Game.Rulesets.Osu.Tests.iOS/Application.cs
@@ -1,9 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using osu.Framework.iOS;
-using UIKit;
-
 namespace osu.Game.Rulesets.Osu.Tests.iOS
 {
     public static class Application
diff --git a/osu.Game.Tests.iOS/AppDelegate.cs b/osu.Game.Tests.iOS/AppDelegate.cs
index 1e703e0c0a..5239dcef2a 100644
--- a/osu.Game.Tests.iOS/AppDelegate.cs
+++ b/osu.Game.Tests.iOS/AppDelegate.cs
@@ -1,9 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using Foundation;
-using osu.Framework.iOS;
-
 namespace osu.Game.Tests.iOS
 {
     [Register("AppDelegate")]
diff --git a/osu.Game.Tests.iOS/Application.cs b/osu.Game.Tests.iOS/Application.cs
index 585b495c96..ec1fbd2573 100644
--- a/osu.Game.Tests.iOS/Application.cs
+++ b/osu.Game.Tests.iOS/Application.cs
@@ -1,9 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using osu.Framework.iOS;
-using UIKit;
-
 namespace osu.Game.Tests.iOS
 {
     public static class Application
diff --git a/osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapDecoderTest.cs b/osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapDecoderTest.cs
index e2d9910b82..e89a0dd797 100644
--- a/osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapDecoderTest.cs
+++ b/osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapDecoderTest.cs
@@ -11,8 +11,6 @@ using osu.Game.Beatmaps.Formats;
 using osu.Game.Beatmaps.Legacy;
 using osu.Game.Beatmaps.Timing;
 using osu.Game.IO;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Catch.Beatmaps;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Legacy;
diff --git a/osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapEncoderTest.cs b/osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapEncoderTest.cs
index 0d436c1ef7..7d55c657bb 100644
--- a/osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapEncoderTest.cs
+++ b/osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapEncoderTest.cs
@@ -17,13 +17,10 @@ using osu.Game.Beatmaps.Formats;
 using osu.Game.Beatmaps.Legacy;
 using osu.Game.IO;
 using osu.Game.IO.Serialization;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Rulesets.Taiko;
 using osu.Game.Skinning;
 using osu.Game.Tests.Resources;
 using osuTK;
diff --git a/osu.Game.Tests/Beatmaps/Formats/LegacyScoreDecoderTest.cs b/osu.Game.Tests/Beatmaps/Formats/LegacyScoreDecoderTest.cs
index 1474f2d277..f1411bf70b 100644
--- a/osu.Game.Tests/Beatmaps/Formats/LegacyScoreDecoderTest.cs
+++ b/osu.Game.Tests/Beatmaps/Formats/LegacyScoreDecoderTest.cs
@@ -11,15 +11,11 @@ using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.Formats;
 using osu.Game.Replays;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
-using osu.Game.Rulesets.Mania.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Replays;
 using osu.Game.Rulesets.Osu.UI;
 using osu.Game.Rulesets.Replays;
 using osu.Game.Rulesets.Scoring;
-using osu.Game.Rulesets.Taiko;
 using osu.Game.Scoring;
 using osu.Game.Scoring.Legacy;
 using osu.Game.Tests.Resources;
diff --git a/osu.Game.Tests/Editing/Checks/CheckConcurrentObjectsTest.cs b/osu.Game.Tests/Editing/Checks/CheckConcurrentObjectsTest.cs
index 5adb91a22e..5be2ca46bf 100644
--- a/osu.Game.Tests/Editing/Checks/CheckConcurrentObjectsTest.cs
+++ b/osu.Game.Tests/Editing/Checks/CheckConcurrentObjectsTest.cs
@@ -8,7 +8,6 @@ using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Checks;
-using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Objects;
diff --git a/osu.Game.Tests/Mods/MultiModIncompatibilityTest.cs b/osu.Game.Tests/Mods/MultiModIncompatibilityTest.cs
index 312b939315..306bf4be79 100644
--- a/osu.Game.Tests/Mods/MultiModIncompatibilityTest.cs
+++ b/osu.Game.Tests/Mods/MultiModIncompatibilityTest.cs
@@ -6,11 +6,8 @@ using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Rulesets.Taiko;
 using osu.Game.Utils;
 
 namespace osu.Game.Tests.Mods
diff --git a/osu.Game.Tests/NonVisual/RulesetInfoOrderingTest.cs b/osu.Game.Tests/NonVisual/RulesetInfoOrderingTest.cs
index ae999d08d5..5e41b426ea 100644
--- a/osu.Game.Tests/NonVisual/RulesetInfoOrderingTest.cs
+++ b/osu.Game.Tests/NonVisual/RulesetInfoOrderingTest.cs
@@ -4,7 +4,6 @@
 using System.Linq;
 using NUnit.Framework;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Osu;
 
 namespace osu.Game.Tests.NonVisual
diff --git a/osu.Game.Tests/NonVisual/ScoreInfoTest.cs b/osu.Game.Tests/NonVisual/ScoreInfoTest.cs
index 41b08a9e98..cb2c238a47 100644
--- a/osu.Game.Tests/NonVisual/ScoreInfoTest.cs
+++ b/osu.Game.Tests/NonVisual/ScoreInfoTest.cs
@@ -3,8 +3,6 @@
 
 using NUnit.Framework;
 using osu.Game.Online.API;
-using osu.Game.Rulesets.Mania;
-using osu.Game.Rulesets.Mania.Mods;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
diff --git a/osu.Game.Tests/Visual/Editing/TestSceneEditorBeatmapCreation.cs b/osu.Game.Tests/Visual/Editing/TestSceneEditorBeatmapCreation.cs
index b109234fec..37314ba484 100644
--- a/osu.Game.Tests/Visual/Editing/TestSceneEditorBeatmapCreation.cs
+++ b/osu.Game.Tests/Visual/Editing/TestSceneEditorBeatmapCreation.cs
@@ -15,7 +15,6 @@ using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Database;
 using osu.Game.Overlays.Dialog;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.UI;
diff --git a/osu.Game.Tests/Visual/Editing/TestSceneSetupScreen.cs b/osu.Game.Tests/Visual/Editing/TestSceneSetupScreen.cs
index 2f6cf46b21..c70c77f27a 100644
--- a/osu.Game.Tests/Visual/Editing/TestSceneSetupScreen.cs
+++ b/osu.Game.Tests/Visual/Editing/TestSceneSetupScreen.cs
@@ -6,12 +6,9 @@ using osu.Framework.Allocation;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Overlays;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Edit;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Beatmaps;
-using osu.Game.Rulesets.Taiko;
 using osu.Game.Screens.Edit;
 using osu.Game.Screens.Edit.Setup;
 
diff --git a/osu.Game.Tests/Visual/Gameplay/TestSceneAllRulesetPlayers.cs b/osu.Game.Tests/Visual/Gameplay/TestSceneAllRulesetPlayers.cs
index e10ef57a25..1c7da14e3f 100644
--- a/osu.Game.Tests/Visual/Gameplay/TestSceneAllRulesetPlayers.cs
+++ b/osu.Game.Tests/Visual/Gameplay/TestSceneAllRulesetPlayers.cs
@@ -5,11 +5,8 @@ using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Game.Configuration;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Rulesets.Taiko;
 using osu.Game.Screens.Play;
 
 namespace osu.Game.Tests.Visual.Gameplay
diff --git a/osu.Game.Tests/Visual/Gameplay/TestSceneHitErrorMeter.cs b/osu.Game.Tests/Visual/Gameplay/TestSceneHitErrorMeter.cs
index 7febb54010..f5004dee39 100644
--- a/osu.Game.Tests/Visual/Gameplay/TestSceneHitErrorMeter.cs
+++ b/osu.Game.Tests/Visual/Gameplay/TestSceneHitErrorMeter.cs
@@ -15,14 +15,12 @@ using osu.Framework.Threading;
 using osu.Framework.Utils;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Rulesets.Judgements;
-using osu.Game.Rulesets.Mania.Scoring;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Scoring;
 using osu.Game.Rulesets.Scoring;
-using osu.Game.Rulesets.Taiko.Scoring;
 using osu.Game.Rulesets.UI;
 using osu.Game.Scoring;
 using osu.Game.Screens.Play.HUD.HitErrorMeters;
diff --git a/osu.Game.Tests/Visual/Gameplay/TestScenePlayerScoreSubmission.cs b/osu.Game.Tests/Visual/Gameplay/TestScenePlayerScoreSubmission.cs
index 58b5df2612..0d0fd41adc 100644
--- a/osu.Game.Tests/Visual/Gameplay/TestScenePlayerScoreSubmission.cs
+++ b/osu.Game.Tests/Visual/Gameplay/TestScenePlayerScoreSubmission.cs
@@ -12,12 +12,10 @@ using osu.Game.Online.API;
 using osu.Game.Online.Rooms;
 using osu.Game.Online.Solo;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Judgements;
 using osu.Game.Rulesets.Scoring;
-using osu.Game.Rulesets.Taiko;
 using osu.Game.Scoring;
 using osu.Game.Screens.Ranking;
 using osu.Game.Tests.Beatmaps;
diff --git a/osu.Game.Tests/Visual/Gameplay/TestSceneSpectatorHost.cs b/osu.Game.Tests/Visual/Gameplay/TestSceneSpectatorHost.cs
index 034519fbf8..75a2625cc9 100644
--- a/osu.Game.Tests/Visual/Gameplay/TestSceneSpectatorHost.cs
+++ b/osu.Game.Tests/Visual/Gameplay/TestSceneSpectatorHost.cs
@@ -7,7 +7,6 @@ using osu.Game.Online.API;
 using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Online.Spectator;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Tests.Visual.Spectator;
 
 namespace osu.Game.Tests.Visual.Gameplay
diff --git a/osu.Game.Tests/Visual/Multiplayer/TestSceneAllPlayersQueueMode.cs b/osu.Game.Tests/Visual/Multiplayer/TestSceneAllPlayersQueueMode.cs
index 0785315b26..de740bbc6a 100644
--- a/osu.Game.Tests/Visual/Multiplayer/TestSceneAllPlayersQueueMode.cs
+++ b/osu.Game.Tests/Visual/Multiplayer/TestSceneAllPlayersQueueMode.cs
@@ -13,7 +13,6 @@ using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Online.Multiplayer;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
diff --git a/osu.Game.Tests/Visual/Multiplayer/TestSceneLoungeRoomsContainer.cs b/osu.Game.Tests/Visual/Multiplayer/TestSceneLoungeRoomsContainer.cs
index 93cd281bc5..629a1e8b45 100644
--- a/osu.Game.Tests/Visual/Multiplayer/TestSceneLoungeRoomsContainer.cs
+++ b/osu.Game.Tests/Visual/Multiplayer/TestSceneLoungeRoomsContainer.cs
@@ -8,7 +8,6 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Testing;
 using osu.Game.Online.Rooms;
-using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.OnlinePlay.Lounge;
 using osu.Game.Screens.OnlinePlay.Lounge.Components;
diff --git a/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayer.cs b/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayer.cs
index 8e45d99eae..0655c1d7fe 100644
--- a/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayer.cs
+++ b/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayer.cs
@@ -26,7 +26,6 @@ using osu.Game.Online.Multiplayer;
 using osu.Game.Online.Rooms;
 using osu.Game.Overlays.Mods;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
diff --git a/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSongSelect.cs b/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSongSelect.cs
index eacd80925d..c3b78654e6 100644
--- a/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSongSelect.cs
+++ b/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSongSelect.cs
@@ -17,12 +17,9 @@ using osu.Game.Database;
 using osu.Game.Online.Rooms;
 using osu.Game.Overlays.Mods;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
-using osu.Game.Rulesets.Taiko;
-using osu.Game.Rulesets.Taiko.Mods;
 using osu.Game.Screens.OnlinePlay;
 using osu.Game.Screens.OnlinePlay.Multiplayer;
 using osu.Game.Screens.Select;
diff --git a/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSubScreen.cs b/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSubScreen.cs
index 7ae81c9800..181ab8964e 100644
--- a/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSubScreen.cs
+++ b/osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSubScreen.cs
@@ -19,8 +19,6 @@ using osu.Game.Overlays.Mods;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
-using osu.Game.Rulesets.Taiko;
-using osu.Game.Rulesets.Taiko.Mods;
 using osu.Game.Rulesets.UI;
 using osu.Game.Screens.OnlinePlay;
 using osu.Game.Screens.OnlinePlay.Match;
diff --git a/osu.Game.Tests/Visual/Navigation/TestScenePresentBeatmap.cs b/osu.Game.Tests/Visual/Navigation/TestScenePresentBeatmap.cs
index 63226de750..4483a157e9 100644
--- a/osu.Game.Tests/Visual/Navigation/TestScenePresentBeatmap.cs
+++ b/osu.Game.Tests/Visual/Navigation/TestScenePresentBeatmap.cs
@@ -8,7 +8,6 @@ using osu.Framework.Screens;
 using osu.Game.Beatmaps;
 using osu.Game.Extensions;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Menu;
 
diff --git a/osu.Game.Tests/Visual/Navigation/TestScenePresentScore.cs b/osu.Game.Tests/Visual/Navigation/TestScenePresentScore.cs
index 6c32171b29..93691bb6d9 100644
--- a/osu.Game.Tests/Visual/Navigation/TestScenePresentScore.cs
+++ b/osu.Game.Tests/Visual/Navigation/TestScenePresentScore.cs
@@ -9,7 +9,6 @@ using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Online.API;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Scoring;
 using osu.Game.Screens;
diff --git a/osu.Game.Tests/Visual/Online/TestSceneLeaderboardModSelector.cs b/osu.Game.Tests/Visual/Online/TestSceneLeaderboardModSelector.cs
index aa442ded02..77c0154bcb 100644
--- a/osu.Game.Tests/Visual/Online/TestSceneLeaderboardModSelector.cs
+++ b/osu.Game.Tests/Visual/Online/TestSceneLeaderboardModSelector.cs
@@ -6,9 +6,6 @@ using System.Collections.Specialized;
 using System.Linq;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Rulesets.Mania;
-using osu.Game.Rulesets.Taiko;
-using osu.Game.Rulesets.Catch;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Extensions.IEnumerableExtensions;
diff --git a/osu.Game.Tests/Visual/Online/TestSceneProfileRulesetSelector.cs b/osu.Game.Tests/Visual/Online/TestSceneProfileRulesetSelector.cs
index ae90872439..a3ae14adf2 100644
--- a/osu.Game.Tests/Visual/Online/TestSceneProfileRulesetSelector.cs
+++ b/osu.Game.Tests/Visual/Online/TestSceneProfileRulesetSelector.cs
@@ -3,10 +3,7 @@
 
 using osu.Framework.Graphics;
 using osu.Game.Overlays.Profile.Header.Components;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Rulesets.Taiko;
 using osu.Framework.Bindables;
 using osu.Game.Overlays;
 using osu.Framework.Allocation;
diff --git a/osu.Game.Tests/Visual/Online/TestSceneRankingsOverlay.cs b/osu.Game.Tests/Visual/Online/TestSceneRankingsOverlay.cs
index 027f17fff4..fc0935baec 100644
--- a/osu.Game.Tests/Visual/Online/TestSceneRankingsOverlay.cs
+++ b/osu.Game.Tests/Visual/Online/TestSceneRankingsOverlay.cs
@@ -6,8 +6,6 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Overlays;
 using osu.Game.Overlays.Rankings;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Users;
 
diff --git a/osu.Game.Tests/Visual/Online/TestSceneSpotlightsLayout.cs b/osu.Game.Tests/Visual/Online/TestSceneSpotlightsLayout.cs
index 266dcb013b..fd4e3979ff 100644
--- a/osu.Game.Tests/Visual/Online/TestSceneSpotlightsLayout.cs
+++ b/osu.Game.Tests/Visual/Online/TestSceneSpotlightsLayout.cs
@@ -8,10 +8,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Game.Overlays;
 using osu.Game.Overlays.Rankings;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Rulesets.Taiko;
 
 namespace osu.Game.Tests.Visual.Online
 {
diff --git a/osu.Game.Tests/Visual/Online/TestSceneUserRequest.cs b/osu.Game.Tests/Visual/Online/TestSceneUserRequest.cs
index e7b6a94642..34724e484d 100644
--- a/osu.Game.Tests/Visual/Online/TestSceneUserRequest.cs
+++ b/osu.Game.Tests/Visual/Online/TestSceneUserRequest.cs
@@ -8,12 +8,10 @@ using osu.Framework.Graphics.Containers;
 using osu.Game.Online.API;
 using osu.Game.Online.API.Requests;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Mania;
 using osu.Framework.Graphics;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.API.Requests.Responses;
-using osu.Game.Rulesets.Taiko;
 
 namespace osu.Game.Tests.Visual.Online
 {
diff --git a/osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapInfoWedge.cs b/osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapInfoWedge.cs
index ef04baefa2..b42266c5cc 100644
--- a/osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapInfoWedge.cs
+++ b/osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapInfoWedge.cs
@@ -14,14 +14,11 @@ using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Rulesets;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Legacy;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
-using osu.Game.Rulesets.Taiko;
 using osu.Game.Screens.Select;
 using osuTK;
 
diff --git a/osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapRecommendations.cs b/osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapRecommendations.cs
index 940d001c5b..0cb30a947c 100644
--- a/osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapRecommendations.cs
+++ b/osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapRecommendations.cs
@@ -12,10 +12,7 @@ using osu.Game.Online.API;
 using osu.Game.Online.API.Requests;
 using osu.Game.Online.API.Requests.Responses;
 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.Tests.Resources;
 using osu.Game.Users;
 
diff --git a/osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs b/osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs
index aad7f6b301..363c0c5e07 100644
--- a/osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs
+++ b/osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs
@@ -24,7 +24,6 @@ using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
-using osu.Game.Rulesets.Taiko;
 using osu.Game.Scoring;
 using osu.Game.Screens.Play;
 using osu.Game.Screens.Select;
diff --git a/osu.Game.Tests/Visual/UserInterface/TestSceneModSwitchSmall.cs b/osu.Game.Tests/Visual/UserInterface/TestSceneModSwitchSmall.cs
index 447352b7a6..79ec143b3d 100644
--- a/osu.Game.Tests/Visual/UserInterface/TestSceneModSwitchSmall.cs
+++ b/osu.Game.Tests/Visual/UserInterface/TestSceneModSwitchSmall.cs
@@ -10,10 +10,7 @@ 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;
 
diff --git a/osu.Game.Tests/Visual/UserInterface/TestSceneModSwitchTiny.cs b/osu.Game.Tests/Visual/UserInterface/TestSceneModSwitchTiny.cs
index dbde7ce425..80facca17d 100644
--- a/osu.Game.Tests/Visual/UserInterface/TestSceneModSwitchTiny.cs
+++ b/osu.Game.Tests/Visual/UserInterface/TestSceneModSwitchTiny.cs
@@ -10,10 +10,7 @@ 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;
 
diff --git a/osu.Game.Tests/Visual/UserInterface/TestSceneOverlayRulesetSelector.cs b/osu.Game.Tests/Visual/UserInterface/TestSceneOverlayRulesetSelector.cs
index f4fa41a3b7..6674ac1ca7 100644
--- a/osu.Game.Tests/Visual/UserInterface/TestSceneOverlayRulesetSelector.cs
+++ b/osu.Game.Tests/Visual/UserInterface/TestSceneOverlayRulesetSelector.cs
@@ -2,10 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Graphics;
-using osu.Game.Rulesets.Catch;
-using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Rulesets.Taiko;
 using osu.Framework.Bindables;
 using osu.Game.Overlays;
 using osu.Game.Rulesets;
diff --git a/osu.Game/Online/MisskeyAPI/Requests/Responses/UsersShow.cs b/osu.Game/Online/MisskeyAPI/Requests/Responses/UsersShow.cs
index a241645547..52d3980e6c 100644
--- a/osu.Game/Online/MisskeyAPI/Requests/Responses/UsersShow.cs
+++ b/osu.Game/Online/MisskeyAPI/Requests/Responses/UsersShow.cs
@@ -4,7 +4,6 @@
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
-using System.Net;
 using JetBrains.Annotations;
 
 namespace osu.Game.Online.MisskeyAPI.Requests.Responses
diff --git a/osu.Game/Overlays/Login/LoginForm.cs b/osu.Game/Overlays/Login/LoginForm.cs
index 5df76b5d8d..e13c729a11 100644
--- a/osu.Game/Overlays/Login/LoginForm.cs
+++ b/osu.Game/Overlays/Login/LoginForm.cs
@@ -16,7 +16,6 @@ using osu.Game.Online.API;
 using osu.Game.Overlays.Settings;
 using osu.Game.Resources.Localisation.Web;
 using osuTK;
-using Realms.Logging;
 
 namespace osu.Game.Overlays.Login
 {
diff --git a/osu.Game/Screens/Misskey/MisskeyLogin.cs b/osu.Game/Screens/Misskey/MisskeyLogin.cs
index bc19dcc091..8c98b2b042 100644
--- a/osu.Game/Screens/Misskey/MisskeyLogin.cs
+++ b/osu.Game/Screens/Misskey/MisskeyLogin.cs
@@ -6,8 +6,6 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Game.Graphics;
-using osu.Game.Graphics.Containers;
-using osu.Game.Overlays.Login;
 using osuTK;
 using osuTK.Graphics;
 
diff --git a/osu.iOS.slnf b/osu.iOS.slnf
index 48b1a095a1..52008b3121 100644
--- a/osu.iOS.slnf
+++ b/osu.iOS.slnf
@@ -2,14 +2,8 @@
   "solution": {
     "path": "osu.sln",
     "projects": [
-      "osu.Game.Rulesets.Catch.Tests.iOS\\osu.Game.Rulesets.Catch.Tests.iOS.csproj",
-      "osu.Game.Rulesets.Catch\\osu.Game.Rulesets.Catch.csproj",
-      "osu.Game.Rulesets.Mania.Tests.iOS\\osu.Game.Rulesets.Mania.Tests.iOS.csproj",
-      "osu.Game.Rulesets.Mania\\osu.Game.Rulesets.Mania.csproj",
       "osu.Game.Rulesets.Osu.Tests.iOS\\osu.Game.Rulesets.Osu.Tests.iOS.csproj",
       "osu.Game.Rulesets.Osu\\osu.Game.Rulesets.Osu.csproj",
-      "osu.Game.Rulesets.Taiko.Tests.iOS\\osu.Game.Rulesets.Taiko.Tests.iOS.csproj",
-      "osu.Game.Rulesets.Taiko\\osu.Game.Rulesets.Taiko.csproj",
       "osu.Game.Tests.iOS\\osu.Game.Tests.iOS.csproj",
       "osu.Game.Tests\\osu.Game.Tests.csproj",
       "osu.Game\\osu.Game.csproj",
diff --git a/osu.iOS/AppDelegate.cs b/osu.iOS/AppDelegate.cs
index 14e3627752..ae47c81498 100644
--- a/osu.iOS/AppDelegate.cs
+++ b/osu.iOS/AppDelegate.cs
@@ -1,11 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using System.Threading.Tasks;
-using Foundation;
-using osu.Framework.iOS;
-using UIKit;
-
 namespace osu.iOS
 {
     [Register("AppDelegate")]
diff --git a/osu.iOS/Application.cs b/osu.iOS/Application.cs
index ffabdb4698..1f923119d4 100644
--- a/osu.iOS/Application.cs
+++ b/osu.iOS/Application.cs
@@ -1,9 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using osu.Framework.iOS;
-using UIKit;
-
 namespace osu.iOS
 {
     public static class Application
diff --git a/osu.iOS/OsuGameIOS.cs b/osu.iOS/OsuGameIOS.cs
index 9c1795e45e..901dd0c98f 100644
--- a/osu.iOS/OsuGameIOS.cs
+++ b/osu.iOS/OsuGameIOS.cs
@@ -1,14 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using System;
-using Foundation;
-using osu.Framework.Graphics;
-using osu.Game;
-using osu.Game.Updater;
-using osu.Game.Utils;
-using Xamarin.Essentials;
-
 namespace osu.iOS
 {
     public class OsuGameIOS : OsuGame