Added Descriptions to Rulesets + PlayModes list

osu.Game.Modes.Catch/CatchRuleset.cs

@@ -79,6 +79,8 @@ namespace osu.Game.Modes.Catch
 
         protected override PlayMode PlayMode => PlayMode.Catch;
 
+        public override string Description => "osu!catch";
+
         public override FontAwesome Icon => FontAwesome.fa_osu_fruits_o;
 
         public override ScoreProcessor CreateScoreProcessor(int hitObjectCount = 0) => null;

osu.Game.Modes.Mania/ManiaRuleset.cs

@@ -100,6 +100,8 @@ namespace osu.Game.Modes.Mania
 
         protected override PlayMode PlayMode => PlayMode.Mania;
 
+        public override string Description => "osu!mania";
+
         public override FontAwesome Icon => FontAwesome.fa_osu_mania_o;
 
         public override ScoreProcessor CreateScoreProcessor(int hitObjectCount = 0) => null;

osu.Game.Modes.Osu/OsuRuleset.cs

@@ -111,5 +111,7 @@ namespace osu.Game.Modes.Osu
         }
 
         protected override PlayMode PlayMode => PlayMode.Osu;
+
+        public override string Description => "osu!";
     }
 }

osu.Game.Modes.Taiko/TaikoRuleset.cs

@@ -79,6 +79,8 @@ namespace osu.Game.Modes.Taiko
 
         protected override PlayMode PlayMode => PlayMode.Taiko;
 
+        public override string Description => "osu!taiko";
+
         public override FontAwesome Icon => FontAwesome.fa_osu_taiko_o;
 
         public override ScoreProcessor CreateScoreProcessor(int hitObjectCount = 0) => null;

osu.Game/Modes/PlayMode.cs

@@ -1,19 +1,13 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System.ComponentModel;
-
 namespace osu.Game.Modes
 {
     public enum PlayMode
     {
-        [Description(@"osu!")]
         Osu = 0,
-        [Description(@"osu!taiko")]
         Taiko = 1,
-        [Description(@"osu!catch")]
         Catch = 2,
-        [Description(@"osu!mania")]
         Mania = 3
     }
 }

osu.Game/Modes/Ruleset.cs

@@ -22,6 +22,8 @@ namespace osu.Game.Modes
     {
         private static ConcurrentDictionary<PlayMode, Type> availableRulesets = new ConcurrentDictionary<PlayMode, Type>();
 
+        public static IEnumerable<PlayMode> PlayModes => availableRulesets.Keys;
+
         public abstract ScoreOverlay CreateScoreOverlay();
 
         public virtual IEnumerable<BeatmapStatistic> GetBeatmapStatistics(WorkingBeatmap beatmap) => new BeatmapStatistic[] { };
@@ -42,6 +44,8 @@ namespace osu.Game.Modes
 
         public virtual FontAwesome Icon => FontAwesome.fa_question_circle;
 
+        public abstract string Description { get; }
+
         public virtual Score CreateAutoplayScore(Beatmap beatmap) => null;
 
         public static Ruleset GetRuleset(PlayMode mode)

osu.Game/Overlays/Toolbar/ToolbarModeButton.cs

@@ -17,8 +17,8 @@ namespace osu.Game.Overlays.Toolbar
             set
             {
                 mode = value;
-                TooltipMain = mode.GetDescription();
+                TooltipMain = Ruleset.GetRuleset(mode).Description;
-                TooltipSub = $"Play some {mode.GetDescription()}";
+                TooltipSub = $"Play some {Ruleset.GetRuleset(mode).Description}";
                 Icon = Ruleset.GetRuleset(mode).Icon;
             }
         }

osu.Game/Overlays/Toolbar/ToolbarModeSelector.cs

@@ -64,7 +64,7 @@ namespace osu.Game.Overlays.Toolbar
                 }
             };
 
-            foreach (PlayMode m in Enum.GetValues(typeof(PlayMode)))
+            foreach (PlayMode m in Ruleset.PlayModes)
             {
                 var localMode = m;
                 modeButtons.Add(new ToolbarModeButton