diff --git a/osu.Game.Rulesets.Mania/ManiaRuleset.cs b/osu.Game.Rulesets.Mania/ManiaRuleset.cs
index 02ecb3afda..08fecacbab 100644
--- a/osu.Game.Rulesets.Mania/ManiaRuleset.cs
+++ b/osu.Game.Rulesets.Mania/ManiaRuleset.cs
@@ -96,6 +96,20 @@ namespace osu.Game.Rulesets.Mania
                 yield return new ManiaModSuddenDeath();
         }
 
+        private static readonly Mod[] key_mods =
+        {
+            new MultiMod(),
+            new ManiaModKey1(),
+            new ManiaModKey2(),
+            new ManiaModKey3(),
+            new ManiaModKey4(),
+            new ManiaModKey5(),
+            new ManiaModKey6(),
+            new ManiaModKey7(),
+            new ManiaModKey8(),
+            new ManiaModKey9(),
+        };
+
         public override IEnumerable<Mod> GetModsFor(ModType type)
         {
             switch (type)
@@ -114,7 +128,6 @@ namespace osu.Game.Rulesets.Mania
                             },
                         },
                     };
-
                 case ModType.DifficultyIncrease:
                     return new Mod[]
                     {
@@ -145,7 +158,6 @@ namespace osu.Game.Rulesets.Mania
                         },
                         new ManiaModFlashlight(),
                     };
-
                 case ModType.Special:
                     return new Mod[]
                     {
@@ -176,7 +188,85 @@ namespace osu.Game.Rulesets.Mania
                             },
                         },
                     };
+                case ModType.DifficultyCalculation:
+                    var mods = new List<Mod>();
+                    foreach (var keyMod in key_mods)
+                    {
+                        mods.AddRange(new[]
+                        {
+                            keyMod,
+                            new MultiMod
+                            {
+                                Mods = new[]
+                                {
+                                    keyMod,
+                                    new ManiaModDoubleTime(),
+                                }
+                            },
+                            new MultiMod
+                            {
+                                Mods = new[]
+                                {
+                                    keyMod,
+                                    new ManiaModHalfTime(),
+                                }
+                            },
+                            new MultiMod
+                            {
+                                Mods = new[]
+                                {
+                                    keyMod,
+                                    new ManiaModEasy(),
+                                }
+                            },
+                            new MultiMod
+                            {
+                                Mods = new[]
+                                {
+                                    keyMod,
+                                    new ManiaModHardRock(),
+                                }
+                            },
+                            new MultiMod
+                            {
+                                Mods = new[]
+                                {
+                                    keyMod,
+                                    new ManiaModEasy(),
+                                    new ManiaModDoubleTime(),
+                                }
+                            },
+                            new MultiMod
+                            {
+                                Mods = new[]
+                                {
+                                    keyMod,
+                                    new ManiaModEasy(),
+                                    new ManiaModHalfTime(),
+                                }
+                            },
+                            new MultiMod
+                            {
+                                Mods = new[]
+                                {
+                                    keyMod,
+                                    new ManiaModHardRock(),
+                                    new ManiaModDoubleTime(),
+                                }
+                            },
+                            new MultiMod
+                            {
+                                Mods = new[]
+                                {
+                                    keyMod,
+                                    new ManiaModHardRock(),
+                                    new ManiaModHalfTime(),
+                                }
+                            },
+                        });
+                    }
 
+                    return mods.ToArray();
                 default:
                     return new Mod[] { };
             }
diff --git a/osu.Game.Rulesets.Osu/OsuRuleset.cs b/osu.Game.Rulesets.Osu/OsuRuleset.cs
index c455bb2af6..31eff5493b 100644
--- a/osu.Game.Rulesets.Osu/OsuRuleset.cs
+++ b/osu.Game.Rulesets.Osu/OsuRuleset.cs
@@ -102,7 +102,6 @@ namespace osu.Game.Rulesets.Osu
                             },
                         },
                     };
-
                 case ModType.DifficultyIncrease:
                     return new Mod[]
                     {
@@ -126,7 +125,6 @@ namespace osu.Game.Rulesets.Osu
                         new OsuModHidden(),
                         new OsuModFlashlight(),
                     };
-
                 case ModType.Special:
                     return new Mod[]
                     {
@@ -143,7 +141,47 @@ namespace osu.Game.Rulesets.Osu
                         },
                         new OsuModTarget(),
                     };
-
+                case ModType.DifficultyCalculation:
+                    return new Mod[]
+                    {
+                        new MultiMod(),
+                        new OsuModDoubleTime(),
+                        new OsuModHalfTime(),
+                        new OsuModEasy(),
+                        new OsuModHardRock(),
+                        new MultiMod
+                        {
+                            Mods = new Mod[]
+                            {
+                                new OsuModEasy(),
+                                new OsuModDoubleTime(),
+                            }
+                        },
+                        new MultiMod
+                        {
+                            Mods = new Mod[]
+                            {
+                                new OsuModEasy(),
+                                new OsuModHalfTime(),
+                            }
+                        },
+                        new MultiMod
+                        {
+                            Mods = new Mod[]
+                            {
+                                new OsuModHardRock(),
+                                new OsuModDoubleTime(),
+                            }
+                        },
+                        new MultiMod
+                        {
+                            Mods = new Mod[]
+                            {
+                                new OsuModHardRock(),
+                                new OsuModHalfTime(),
+                            }
+                        },
+                    };
                 default:
                     return new Mod[] { };
             }
diff --git a/osu.Game.Rulesets.Taiko/TaikoRuleset.cs b/osu.Game.Rulesets.Taiko/TaikoRuleset.cs
index abaa8db597..a249646285 100644
--- a/osu.Game.Rulesets.Taiko/TaikoRuleset.cs
+++ b/osu.Game.Rulesets.Taiko/TaikoRuleset.cs
@@ -93,7 +93,6 @@ namespace osu.Game.Rulesets.Taiko
                             },
                         },
                     };
-
                 case ModType.DifficultyIncrease:
                     return new Mod[]
                     {
@@ -117,7 +116,6 @@ namespace osu.Game.Rulesets.Taiko
                         new TaikoModHidden(),
                         new TaikoModFlashlight(),
                     };
-
                 case ModType.Special:
                     return new Mod[]
                     {
@@ -133,7 +131,47 @@ namespace osu.Game.Rulesets.Taiko
                             },
                         },
                     };
-
+                case ModType.DifficultyCalculation:
+                    return new Mod[]
+                    {
+                        new MultiMod(),
+                        new TaikoModDoubleTime(),
+                        new TaikoModHalfTime(),
+                        new TaikoModEasy(),
+                        new TaikoModHardRock(),
+                        new MultiMod
+                        {
+                            Mods = new Mod[]
+                            {
+                                new TaikoModEasy(),
+                                new TaikoModDoubleTime(),
+                            }
+                        },
+                        new MultiMod
+                        {
+                            Mods = new Mod[]
+                            {
+                                new TaikoModEasy(),
+                                new TaikoModHalfTime(),
+                            }
+                        },
+                        new MultiMod
+                        {
+                            Mods = new Mod[]
+                            {
+                                new TaikoModHardRock(),
+                                new TaikoModDoubleTime(),
+                            }
+                        },
+                        new MultiMod
+                        {
+                            Mods = new Mod[]
+                            {
+                                new TaikoModHardRock(),
+                                new TaikoModHalfTime(),
+                            }
+                        },
+                    };
                 default:
                     return new Mod[] { };
             }
diff --git a/osu.Game/Rulesets/Mods/ModType.cs b/osu.Game/Rulesets/Mods/ModType.cs
index 1941724879..5619899c48 100644
--- a/osu.Game/Rulesets/Mods/ModType.cs
+++ b/osu.Game/Rulesets/Mods/ModType.cs
@@ -8,5 +8,6 @@ namespace osu.Game.Rulesets.Mods
         DifficultyReduction,
         DifficultyIncrease,
         Special,
+        DifficultyCalculation
     }
 }