Add a button to clear guest scores.

osu.Game/Localisation/DeleteConfirmationContentStrings.cs

@@ -39,6 +39,11 @@ public static class DeleteConfirmationContentStrings
         /// </summary>
         public static LocalisableString Scores => new TranslatableString(getKey(@"scores"), @"Are you sure you want to delete all scores? This cannot be undone!");
 
+        /// <summary>
+        /// "Are you sure you want to delete all guest scores? This cannot be undone!"
+        /// </summary>
+        public static LocalisableString GuestScores => new TranslatableString(getKey(@"guest_scores"), @"Are you sure you want to delete all guest scores? This cannot be undone!");
+
         /// <summary>
         /// "Are you sure you want to delete all mod presets?"
         /// </summary>

osu.Game/Localisation/MaintenanceSettingsStrings.cs

@@ -64,6 +64,11 @@ public static class MaintenanceSettingsStrings
         /// </summary>
         public static LocalisableString DeleteAllScores => new TranslatableString(getKey(@"delete_all_scores"), @"Delete ALL scores");
 
+        /// <summary>
+        /// "Delete Guest scores"
+        /// </summary>
+        public static LocalisableString DeleteGuestScores => new TranslatableString(getKey(@"delete_guest_scores"), @"Delete Guest scores");
+
         /// <summary>
         /// "Delete ALL skins"
         /// </summary>

osu.Game/Overlays/Settings/Sections/Maintenance/ScoreSettings.cs

@@ -14,6 +14,7 @@ public partial class ScoreSettings : SettingsSubsection
         protected override LocalisableString Header => CommonStrings.Scores;
 
         private SettingsButtonV2 deleteScoresButton = null!;
+        private SettingsButtonV2 deleteGuestScoresButton = null!;
 
         [BackgroundDependencyLoader]
         private void load(ScoreManager scores, IDialogOverlay? dialogOverlay)
@@ -30,6 +31,18 @@ private void load(ScoreManager scores, IDialogOverlay? dialogOverlay)
                     }, DeleteConfirmationContentStrings.Scores));
                 }
             });
+            Add(deleteGuestScoresButton = new DangerousSettingsButtonV2
+            {
+                Text = MaintenanceSettingsStrings.DeleteGuestScores,
+                Action = () =>
+                {
+                    dialogOverlay?.Push(new MassDeleteConfirmationDialog(() =>
+                    {
+                        deleteGuestScoresButton.Enabled.Value = false;
+                        Task.Run(() => scores.DeleteGuest()).ContinueWith(_ => Schedule(() => deleteGuestScoresButton.Enabled.Value = true));
+                    }, DeleteConfirmationContentStrings.GuestScores));
+                }
+            });
         }
     }
 }

osu.Game/Scoring/ScoreManager.cs

@@ -15,11 +15,14 @@
 using osu.Game.Configuration;
 using osu.Game.Database;
 using osu.Game.IO.Archives;
+using osu.Game.Models;
 using osu.Game.Online.API;
+using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Overlays.Notifications;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring.Legacy;
+using Realms;
 
 namespace osu.Game.Scoring
 {
@@ -166,6 +169,18 @@
             }
         }
 
+        public void DeleteGuest(bool silent = false)
+        {
+            Realm.Run(r =>
+            {
+                var guestScores = r.All<ScoreInfo>()
+                                   .Filter(@"DeletePending == false AND RealmUser.OnlineID == $0", APIUser.SYSTEM_USER_ID)
+                                   .ToList();
+
+                Delete(guestScores, silent);
+            });
+        }
+
         public void Delete(Expression<Func<ScoreInfo, bool>>? filter = null, bool silent = false)
         {
             Realm.Run(r =>