diff --git a/apps/wolf_3d_cli/lib/cli_save_game_persistence.dart b/apps/wolf_3d_cli/lib/cli_save_game_persistence.dart
index 21066a2..94dedd2 100644
--- a/apps/wolf_3d_cli/lib/cli_save_game_persistence.dart
+++ b/apps/wolf_3d_cli/lib/cli_save_game_persistence.dart
@@ -34,6 +34,19 @@ class CliSaveGamePersistence implements SaveGamePersistence {
     }
   }
 
+  @override
+  Future<bool> exists({
+    required int slot,
+    required GameVersion version,
+  }) async {
+    try {
+      final File file = File(_slotPath(slot, version));
+      return file.existsSync() && file.lengthSync() > 0;
+    } catch (_) {
+      return false;
+    }
+  }
+
   @override
   Future<void> save({
     required int slot,
diff --git a/packages/wolf_3d_flutter/lib/save_game_persistence_flutter.dart b/packages/wolf_3d_flutter/lib/save_game_persistence_flutter.dart
index 525581a..1100899 100644
--- a/packages/wolf_3d_flutter/lib/save_game_persistence_flutter.dart
+++ b/packages/wolf_3d_flutter/lib/save_game_persistence_flutter.dart
@@ -51,6 +51,24 @@ class FlutterSaveGamePersistence implements SaveGamePersistence {
     }
   }
 
+  @override
+  Future<bool> exists({
+    required int slot,
+    required GameVersion version,
+  }) async {
+    if (kIsWeb) {
+      return false;
+    }
+
+    try {
+      final String dirPath = await _resolveDirectoryPath();
+      final File file = File(_slotPath(dirPath, slot, version));
+      return file.existsSync() && file.lengthSync() > 0;
+    } catch (_) {
+      return false;
+    }
+  }
+
   @override
   Future<void> save({
     required int slot,