diff --git a/osu.Game/Beatmaps/BeatmapConverter.cs b/osu.Game/Beatmaps/BeatmapConverter.cs
index b291edd19d..f3434c5153 100644
--- a/osu.Game/Beatmaps/BeatmapConverter.cs
+++ b/osu.Game/Beatmaps/BeatmapConverter.cs
@@ -27,8 +27,6 @@ namespace osu.Game.Beatmaps
 
         public IBeatmap Beatmap { get; }
 
-        private CancellationToken cancellationToken;
-
         protected BeatmapConverter(IBeatmap beatmap, Ruleset ruleset)
         {
             Beatmap = beatmap;
@@ -41,8 +39,6 @@ namespace osu.Game.Beatmaps
 
         public IBeatmap Convert(CancellationToken cancellationToken = default)
         {
-            this.cancellationToken = cancellationToken;
-
             // We always operate on a clone of the original beatmap, to not modify it game-wide
             return ConvertBeatmap(Beatmap.Clone(), cancellationToken);
         }
@@ -55,19 +51,6 @@ namespace osu.Game.Beatmaps
         /// <returns>The converted Beatmap.</returns>
         protected virtual Beatmap<T> ConvertBeatmap(IBeatmap original, CancellationToken cancellationToken)
         {
-#pragma warning disable 618
-            return ConvertBeatmap(original);
-#pragma warning restore 618
-        }
-
-        /// <summary>
-        /// Performs the conversion of a Beatmap using this Beatmap Converter.
-        /// </summary>
-        /// <param name="original">The un-converted Beatmap.</param>
-        /// <returns>The converted Beatmap.</returns>
-        [Obsolete("Use the cancellation-supporting override")] // Can be removed 20210318
-        protected virtual Beatmap<T> ConvertBeatmap(IBeatmap original)
-        {
             var beatmap = CreateBeatmap();
 
             beatmap.BeatmapInfo = original.BeatmapInfo;
@@ -121,21 +104,6 @@ namespace osu.Game.Beatmaps
         /// <param name="beatmap">The un-converted Beatmap.</param>
         /// <param name="cancellationToken">The cancellation token.</param>
         /// <returns>The converted hit object.</returns>
-        protected virtual IEnumerable<T> ConvertHitObject(HitObject original, IBeatmap beatmap, CancellationToken cancellationToken)
-        {
-#pragma warning disable 618
-            return ConvertHitObject(original, beatmap);
-#pragma warning restore 618
-        }
-
-        /// <summary>
-        /// Performs the conversion of a hit object.
-        /// This method is generally executed sequentially for all objects in a beatmap.
-        /// </summary>
-        /// <param name="original">The hit object to convert.</param>
-        /// <param name="beatmap">The un-converted Beatmap.</param>
-        /// <returns>The converted hit object.</returns>
-        [Obsolete("Use the cancellation-supporting override")] // Can be removed 20210318
-        protected virtual IEnumerable<T> ConvertHitObject(HitObject original, IBeatmap beatmap) => Enumerable.Empty<T>();
+        protected virtual IEnumerable<T> ConvertHitObject(HitObject original, IBeatmap beatmap, CancellationToken cancellationToken) => Enumerable.Empty<T>();
     }
 }
diff --git a/osu.Game/Beatmaps/BeatmapStatistic.cs b/osu.Game/Beatmaps/BeatmapStatistic.cs
index 9d87a20d60..7d7ba09fcf 100644
--- a/osu.Game/Beatmaps/BeatmapStatistic.cs
+++ b/osu.Game/Beatmaps/BeatmapStatistic.cs
@@ -3,16 +3,11 @@
 
 using System;
 using osu.Framework.Graphics;
-using osu.Framework.Graphics.Sprites;
-using osuTK;
 
 namespace osu.Game.Beatmaps
 {
     public class BeatmapStatistic
     {
-        [Obsolete("Use CreateIcon instead")] // can be removed 20210203
-        public IconUsage Icon = FontAwesome.Regular.QuestionCircle;
-
         /// <summary>
         /// A function to create the icon for display purposes. Use default icons available via <see cref="BeatmapStatisticIcon"/> whenever possible for conformity.
         /// </summary>
@@ -20,12 +15,5 @@ namespace osu.Game.Beatmaps
 
         public string Content;
         public string Name;
-
-        public BeatmapStatistic()
-        {
-#pragma warning disable 618
-            CreateIcon = () => new SpriteIcon { Icon = Icon, Scale = new Vector2(0.7f) };
-#pragma warning restore 618
-        }
     }
 }
diff --git a/osu.Game/Overlays/Settings/SettingsItem.cs b/osu.Game/Overlays/Settings/SettingsItem.cs
index 85765bf991..0bd9750b0b 100644
--- a/osu.Game/Overlays/Settings/SettingsItem.cs
+++ b/osu.Game/Overlays/Settings/SettingsItem.cs
@@ -57,13 +57,6 @@ namespace osu.Game.Overlays.Settings
             }
         }
 
-        [Obsolete("Use Current instead")] // Can be removed 20210406
-        public Bindable<T> Bindable
-        {
-            get => Current;
-            set => Current = value;
-        }
-
         public virtual Bindable<T> Current
         {
             get => controlWithCurrent.Current;
diff --git a/osu.Game/Rulesets/Judgements/Judgement.cs b/osu.Game/Rulesets/Judgements/Judgement.cs
index b1ca72b1c0..be69db5ca8 100644
--- a/osu.Game/Rulesets/Judgements/Judgement.cs
+++ b/osu.Game/Rulesets/Judgements/Judgement.cs
@@ -28,18 +28,6 @@ namespace osu.Game.Rulesets.Judgements
         /// </summary>
         protected const double DEFAULT_MAX_HEALTH_INCREASE = 0.05;
 
-        /// <summary>
-        /// Whether this <see cref="Judgement"/> should affect the current combo.
-        /// </summary>
-        [Obsolete("Has no effect. Use HitResult members instead (e.g. use small-tick or bonus to not affect combo).")] // Can be removed 20210328
-        public virtual bool AffectsCombo => true;
-
-        /// <summary>
-        /// Whether this <see cref="Judgement"/> should be counted as base (combo) or bonus score.
-        /// </summary>
-        [Obsolete("Has no effect. Use HitResult members instead (e.g. use small-tick or bonus to not affect combo).")] // Can be removed 20210328
-        public virtual bool IsBonus => !AffectsCombo;
-
         /// <summary>
         /// The maximum <see cref="HitResult"/> that can be achieved.
         /// </summary>
diff --git a/osu.Game/Rulesets/Objects/Drawables/DrawableHitObject.cs b/osu.Game/Rulesets/Objects/Drawables/DrawableHitObject.cs
index e5eaf5db88..e69c4e2d91 100644
--- a/osu.Game/Rulesets/Objects/Drawables/DrawableHitObject.cs
+++ b/osu.Game/Rulesets/Objects/Drawables/DrawableHitObject.cs
@@ -736,24 +736,6 @@ namespace osu.Game.Rulesets.Objects.Drawables
             if (!Result.HasResult)
                 throw new InvalidOperationException($"{GetType().ReadableName()} applied a {nameof(JudgementResult)} but did not update {nameof(JudgementResult.Type)}.");
 
-            // Some (especially older) rulesets use scorable judgements instead of the newer ignorehit/ignoremiss judgements.
-            // Can be removed 20210328
-            if (Result.Judgement.MaxResult == HitResult.IgnoreHit)
-            {
-                HitResult originalType = Result.Type;
-
-                if (Result.Type == HitResult.Miss)
-                    Result.Type = HitResult.IgnoreMiss;
-                else if (Result.Type >= HitResult.Meh && Result.Type <= HitResult.Perfect)
-                    Result.Type = HitResult.IgnoreHit;
-
-                if (Result.Type != originalType)
-                {
-                    Logger.Log($"{GetType().ReadableName()} applied an invalid hit result ({originalType}) when {nameof(HitResult.IgnoreMiss)} or {nameof(HitResult.IgnoreHit)} is expected.\n"
-                               + $"This has been automatically adjusted to {Result.Type}, and support will be removed from 2021-03-28 onwards.", level: LogLevel.Important);
-                }
-            }
-
             if (!Result.Type.IsValidHitResult(Result.Judgement.MinResult, Result.Judgement.MaxResult))
             {
                 throw new InvalidOperationException(
diff --git a/osu.Game/Rulesets/Objects/HitObject.cs b/osu.Game/Rulesets/Objects/HitObject.cs
index 826d411822..db02eafa92 100644
--- a/osu.Game/Rulesets/Objects/HitObject.cs
+++ b/osu.Game/Rulesets/Objects/HitObject.cs
@@ -139,15 +139,6 @@ namespace osu.Game.Rulesets.Objects
         }
 
         protected virtual void CreateNestedHitObjects(CancellationToken cancellationToken)
-        {
-            // ReSharper disable once MethodSupportsCancellation (https://youtrack.jetbrains.com/issue/RIDER-44520)
-#pragma warning disable 618
-            CreateNestedHitObjects();
-#pragma warning restore 618
-        }
-
-        [Obsolete("Use the cancellation-supporting override")] // Can be removed 20210318
-        protected virtual void CreateNestedHitObjects()
         {
         }
 
diff --git a/osu.Game/Rulesets/Scoring/ScoreProcessor.cs b/osu.Game/Rulesets/Scoring/ScoreProcessor.cs
index b81fa79345..0fb5c2f4b5 100644
--- a/osu.Game/Rulesets/Scoring/ScoreProcessor.cs
+++ b/osu.Game/Rulesets/Scoring/ScoreProcessor.cs
@@ -346,12 +346,6 @@ namespace osu.Game.Rulesets.Scoring
 
             score.HitEvents = hitEvents;
         }
-
-        /// <summary>
-        /// Create a <see cref="HitWindows"/> for this processor.
-        /// </summary>
-        [Obsolete("Method is now unused.")] // Can be removed 20210328
-        public virtual HitWindows CreateHitWindows() => new HitWindows();
     }
 
     public enum ScoringMode