diff --git a/src/Koogle.Web/Store/GameState/GameEffects.cs b/src/Koogle.Web/Store/GameState/GameEffects.cs
index eb8effb..6c9dbd8 100644
--- a/src/Koogle.Web/Store/GameState/GameEffects.cs
+++ b/src/Koogle.Web/Store/GameState/GameEffects.cs
@@ -303,6 +303,13 @@ public class GameEffects
         var gameTypeName = state.GameTypeName;
         var currentPlayerId = state.Participants.CurrentPlayerId;
 
+        // Block input if game is already over
+        if (state.IsGameOver)
+        {
+            _logger.LogWarning("Cannot process throw: game is already over");
+            return Task.CompletedTask;
+        }
+
         if (string.IsNullOrEmpty(gameTypeName) || !currentPlayerId.HasValue)
         {
             _logger.LogWarning("Cannot process throw: missing game type or player");
@@ -407,6 +414,12 @@ public class GameEffects
             isGameOver,
             winnerId));
 
+        // If game is over, skip save (user must confirm end via UI)
+        if (isGameOver)
+        {
+            return Task.CompletedTask;
+        }
+
         // Debounce save operations to avoid excessive DB writes
         _saveDebounceTimer?.Dispose();
         _saveDebounceTimer = new Timer(
@@ -428,6 +441,13 @@ public class GameEffects
         var gameTypeName = state.GameTypeName;
         var currentPlayerId = state.Participants.CurrentPlayerId;
 
+        // Block input if game is already over
+        if (state.IsGameOver)
+        {
+            dispatcher.Dispatch(new ExecuteGameActionFailureAction("Cannot execute action: game is already over"));
+            return Task.CompletedTask;
+        }
+
         if (string.IsNullOrEmpty(gameTypeName) || !currentPlayerId.HasValue || state.GameModel == null)
         {
             dispatcher.Dispatch(new ExecuteGameActionFailureAction("Cannot execute action: missing game state"));
@@ -451,6 +471,16 @@ public class GameEffects
                     result.IsGameOver,
                     result.WinnerId));
 
+                _logger.LogDebug(
+                    "Game action executed: {ActionId}, rotate={Rotate}, gameOver={GameOver}",
+                    action.ActionId, result.ShouldRotatePlayer, result.IsGameOver);
+
+                // If game is over, skip save (user must confirm end via UI)
+                if (result.IsGameOver)
+                {
+                    return Task.CompletedTask;
+                }
+
                 // Debounce save operations
                 _saveDebounceTimer?.Dispose();
                 _saveDebounceTimer = new Timer(
@@ -458,10 +488,6 @@ public class GameEffects
                     null,
                     SaveDebounceMs,
                     Timeout.Infinite);
-
-                _logger.LogDebug(
-                    "Game action executed: {ActionId}, rotate={Rotate}, gameOver={GameOver}",
-                    action.ActionId, result.ShouldRotatePlayer, result.IsGameOver);
             }
             else
             {
diff --git a/src/Koogle.Web/Store/GameState/GameReducers.cs b/src/Koogle.Web/Store/GameState/GameReducers.cs
index dc2ee48..b2a35c3 100644
--- a/src/Koogle.Web/Store/GameState/GameReducers.cs
+++ b/src/Koogle.Web/Store/GameState/GameReducers.cs
@@ -42,7 +42,9 @@ public static class GameReducers
             UndoStack = [],
             RedoStack = [],
             IsLoading = false,
-            Error = null
+            Error = null,
+            IsGameOver = false,
+            WinnerId = null
         };
 
     /// <summary>
@@ -84,7 +86,9 @@ public static class GameReducers
             UndoStack = [],
             RedoStack = [],
             CompletedGames = [.. state.CompletedGames, action.Summary],
-            IsLoading = false
+            IsLoading = false,
+            IsGameOver = false,
+            WinnerId = null
         };
 
     /// <summary>
@@ -235,25 +239,30 @@ public static class GameReducers
             ThrowPanelAfter = action.NewThrowPanelState,
             GameModel = action.UpdatedGameModel,
             IsLoading = false,
-            IsSaving = true
+            IsSaving = !action.IsGameOver, // Don't save if game is over (EndGame handles it)
+            IsGameOver = action.IsGameOver,
+            WinnerId = action.WinnerId
         };
 
-        // Apply player rotation or override
-        if (action.NextPlayerId.HasValue)
+        // Apply player rotation or override (only if game not over)
+        if (!action.IsGameOver)
         {
-            // Game logic specifies exact next player
-            newState = newState with
+            if (action.NextPlayerId.HasValue)
             {
-                Participants = newState.Participants.SetCurrentPlayer(action.NextPlayerId.Value)
-            };
-        }
-        else if (action.ShouldRotatePlayer)
-        {
-            // Standard rotation to next player
-            newState = newState with
+                // Game logic specifies exact next player
+                newState = newState with
+                {
+                    Participants = newState.Participants.SetCurrentPlayer(action.NextPlayerId.Value)
+                };
+            }
+            else if (action.ShouldRotatePlayer)
             {
-                Participants = newState.Participants.NextPlayer()
-            };
+                // Standard rotation to next player
+                newState = newState with
+                {
+                    Participants = newState.Participants.NextPlayer()
+                };
+            }
         }
 
         return newState;
@@ -569,11 +578,13 @@ public static class GameReducers
         {
             GameModel = action.UpdatedGameModel,
             IsLoading = false,
-            IsSaving = true
+            IsSaving = !action.IsGameOver, // Don't save if game is over (EndGame handles it)
+            IsGameOver = action.IsGameOver,
+            WinnerId = action.WinnerId
         };
 
-        // Apply player rotation if requested
-        if (action.ShouldRotatePlayer)
+        // Apply player rotation if requested (only if game not over)
+        if (!action.IsGameOver && action.ShouldRotatePlayer)
         {
             newState = newState with
             {
diff --git a/src/Koogle.Web/Store/GameState/GameState.cs b/src/Koogle.Web/Store/GameState/GameState.cs
index 99458af..67c25a4 100644
--- a/src/Koogle.Web/Store/GameState/GameState.cs
+++ b/src/Koogle.Web/Store/GameState/GameState.cs
@@ -91,6 +91,16 @@ public record GameState
     /// </summary>
     public bool IsConcurrencyConflict { get; init; }
 
+    /// <summary>
+    /// Indicates the game has ended (show results, block input).
+    /// </summary>
+    public bool IsGameOver { get; init; }
+
+    /// <summary>
+    /// Winner ID if game is over.
+    /// </summary>
+    public Guid? WinnerId { get; init; }
+
     /// <summary>
     /// Private constructor for Fluxor initialization.
     /// </summary>
@@ -115,7 +125,9 @@ public record GameState
         IsLoading = false,
         IsSaving = false,
         Error = null,
-        IsConcurrencyConflict = false
+        IsConcurrencyConflict = false,
+        IsGameOver = false,
+        WinnerId = null
     };
 }