diff --git a/osu.Game/Beatmaps/BeatmapManager.cs b/osu.Game/Beatmaps/BeatmapManager.cs
index da0c379f90..0f2cf6a730 100644
--- a/osu.Game/Beatmaps/BeatmapManager.cs
+++ b/osu.Game/Beatmaps/BeatmapManager.cs
@@ -205,16 +205,16 @@ namespace osu.Game.Beatmaps
             return beatmapModelManager.IsAvailableLocally(model);
         }
 
-        public Action<BeatmapSetInfo> ItemUpdated
+        public event Action<BeatmapSetInfo> ItemUpdated
         {
-            get => beatmapModelManager.ItemUpdated;
-            set => beatmapModelManager.ItemUpdated = value;
+            add => beatmapModelManager.ItemUpdated += value;
+            remove => beatmapModelManager.ItemUpdated -= value;
         }
 
-        public Action<BeatmapSetInfo> ItemRemoved
+        public event Action<BeatmapSetInfo> ItemRemoved
         {
-            get => beatmapModelManager.ItemRemoved;
-            set => beatmapModelManager.ItemRemoved = value;
+            add => beatmapModelManager.ItemRemoved += value;
+            remove => beatmapModelManager.ItemRemoved -= value;
         }
 
         public Task ImportFromStableAsync(StableStorage stableStorage)
@@ -261,16 +261,16 @@ namespace osu.Game.Beatmaps
 
         #region Implementation of IModelDownloader<BeatmapSetInfo>
 
-        public Action<ArchiveDownloadRequest<IBeatmapSetInfo>> DownloadBegan
+        public event Action<ArchiveDownloadRequest<IBeatmapSetInfo>> DownloadBegan
         {
-            get => beatmapModelDownloader.DownloadBegan;
-            set => beatmapModelDownloader.DownloadBegan = value;
+            add => beatmapModelDownloader.DownloadBegan += value;
+            remove => beatmapModelDownloader.DownloadBegan -= value;
         }
 
-        public Action<ArchiveDownloadRequest<IBeatmapSetInfo>> DownloadFailed
+        public event Action<ArchiveDownloadRequest<IBeatmapSetInfo>> DownloadFailed
         {
-            get => beatmapModelDownloader.DownloadFailed;
-            set => beatmapModelDownloader.DownloadFailed = value;
+            add => beatmapModelDownloader.DownloadFailed += value;
+            remove => beatmapModelDownloader.DownloadFailed -= value;
         }
 
         public bool Download(IBeatmapSetInfo model, bool minimiseDownloadSize = false)
diff --git a/osu.Game/Database/ArchiveModelManager.cs b/osu.Game/Database/ArchiveModelManager.cs
index 85419aeedb..019749760f 100644
--- a/osu.Game/Database/ArchiveModelManager.cs
+++ b/osu.Game/Database/ArchiveModelManager.cs
@@ -62,13 +62,13 @@ namespace osu.Game.Database
         /// Fired when a new or updated <typeparamref name="TModel"/> becomes available in the database.
         /// This is not guaranteed to run on the update thread.
         /// </summary>
-        public Action<TModel> ItemUpdated { get; set; }
+        public event Action<TModel> ItemUpdated;
 
         /// <summary>
         /// Fired when a <typeparamref name="TModel"/> is removed from the database.
         /// This is not guaranteed to run on the update thread.
         /// </summary>
-        public Action<TModel> ItemRemoved { get; set; }
+        public event Action<TModel> ItemRemoved;
 
         public virtual IEnumerable<string> HandledExtensions => new[] { @".zip" };
 
diff --git a/osu.Game/Database/IModelDownloader.cs b/osu.Game/Database/IModelDownloader.cs
index d8e3dad8b5..81fba14244 100644
--- a/osu.Game/Database/IModelDownloader.cs
+++ b/osu.Game/Database/IModelDownloader.cs
@@ -17,13 +17,13 @@ namespace osu.Game.Database
         /// Fired when a <typeparamref name="T"/> download begins.
         /// This is NOT run on the update thread and should be scheduled.
         /// </summary>
-        Action<ArchiveDownloadRequest<T>> DownloadBegan { get; set; }
+        event Action<ArchiveDownloadRequest<T>> DownloadBegan;
 
         /// <summary>
         /// Fired when a <typeparamref name="T"/> download is interrupted, either due to user cancellation or failure.
         /// This is NOT run on the update thread and should be scheduled.
         /// </summary>
-        Action<ArchiveDownloadRequest<T>> DownloadFailed { get; set; }
+        event Action<ArchiveDownloadRequest<T>> DownloadFailed;
 
         /// <summary>
         /// Begin a download for the requested <typeparamref name="T"/>.
diff --git a/osu.Game/Database/IModelManager.cs b/osu.Game/Database/IModelManager.cs
index c9257f5877..15ad455f21 100644
--- a/osu.Game/Database/IModelManager.cs
+++ b/osu.Game/Database/IModelManager.cs
@@ -19,12 +19,12 @@ namespace osu.Game.Database
         /// <summary>
         /// Fired when an item is updated.
         /// </summary>
-        Action<TModel> ItemUpdated { get; set; }
+        event Action<TModel> ItemUpdated;
 
         /// <summary>
         /// Fired when an item is removed.
         /// </summary>
-        Action<TModel> ItemRemoved { get; set; }
+        event Action<TModel> ItemRemoved;
 
         /// <summary>
         /// This is a temporary method and will likely be replaced by a full-fledged (and more correctly placed) migration process in the future.
diff --git a/osu.Game/Database/ModelDownloader.cs b/osu.Game/Database/ModelDownloader.cs
index 3684dea456..3c1f181f24 100644
--- a/osu.Game/Database/ModelDownloader.cs
+++ b/osu.Game/Database/ModelDownloader.cs
@@ -19,9 +19,9 @@ namespace osu.Game.Database
     {
         public Action<Notification> PostNotification { protected get; set; }
 
-        public Action<ArchiveDownloadRequest<T>> DownloadBegan { get; set; }
+        public event Action<ArchiveDownloadRequest<T>> DownloadBegan;
 
-        public Action<ArchiveDownloadRequest<T>> DownloadFailed { get; set; }
+        public event Action<ArchiveDownloadRequest<T>> DownloadFailed;
 
         private readonly IModelImporter<TModel> importer;
         private readonly IAPIProvider api;
diff --git a/osu.Game/Scoring/ScoreManager.cs b/osu.Game/Scoring/ScoreManager.cs
index 0cb5ae2236..9b4216084e 100644
--- a/osu.Game/Scoring/ScoreManager.cs
+++ b/osu.Game/Scoring/ScoreManager.cs
@@ -246,16 +246,16 @@ namespace osu.Game.Scoring
 
         #region Implementation of IModelManager<ScoreInfo>
 
-        public Action<ScoreInfo> ItemUpdated
+        public event Action<ScoreInfo> ItemUpdated
         {
-            get => scoreModelManager.ItemUpdated;
-            set => scoreModelManager.ItemUpdated = value;
+            add => scoreModelManager.ItemUpdated += value;
+            remove => scoreModelManager.ItemUpdated -= value;
         }
 
-        public Action<ScoreInfo> ItemRemoved
+        public event Action<ScoreInfo> ItemRemoved
         {
-            get => scoreModelManager.ItemRemoved;
-            set => scoreModelManager.ItemRemoved = value;
+            add => scoreModelManager.ItemRemoved += value;
+            remove => scoreModelManager.ItemRemoved -= value;
         }
 
         public Task ImportFromStableAsync(StableStorage stableStorage)
@@ -358,16 +358,16 @@ namespace osu.Game.Scoring
 
         #region Implementation of IModelDownloader<IScoreInfo>
 
-        public Action<ArchiveDownloadRequest<IScoreInfo>> DownloadBegan
+        public event Action<ArchiveDownloadRequest<IScoreInfo>> DownloadBegan
         {
-            get => scoreModelDownloader.DownloadBegan;
-            set => scoreModelDownloader.DownloadBegan = value;
+            add => scoreModelDownloader.DownloadBegan += value;
+            remove => scoreModelDownloader.DownloadBegan -= value;
         }
 
-        public Action<ArchiveDownloadRequest<IScoreInfo>> DownloadFailed
+        public event Action<ArchiveDownloadRequest<IScoreInfo>> DownloadFailed
         {
-            get => scoreModelDownloader.DownloadFailed;
-            set => scoreModelDownloader.DownloadFailed = value;
+            add => scoreModelDownloader.DownloadFailed += value;
+            remove => scoreModelDownloader.DownloadFailed -= value;
         }
 
         public bool Download(IScoreInfo model, bool minimiseDownloadSize) =>