diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java
index 11caabfe1..011186475 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java
@@ -1793,6 +1793,7 @@ public class GamesListDelegate extends ListDelegateBase
                         && (BuildConfig.DEBUG || XWPrefs.getDebugEnabled( m_activity ));
                 }
                 Utils.setItemVisible( menu, R.id.games_game_invites, enable );
+                Utils.setItemVisible( menu, R.id.games_game_markbad, enable );
                 Utils.setItemVisible( menu, R.id.games_game_netstats, isMultiGame );
 
                 enable = !m_launchedGames.contains( rowID );
@@ -1989,6 +1990,11 @@ public class GamesListDelegate extends ListDelegateBase
             makeOkOnlyBuilder( msg ).show();
             break;
 
+            // DEBUG only
+        case R.id.games_game_markbad:
+            Quarantine.recordOpened( selRowIDs[0] );
+            break;
+
         default:
             handled = false;
         }
diff --git a/xwords4/android/app/src/main/res/menu/games_list_game_menu.xml b/xwords4/android/app/src/main/res/menu/games_list_game_menu.xml
index 97bf85a39..6bf76aec9 100644
--- a/xwords4/android/app/src/main/res/menu/games_list_game_menu.xml
+++ b/xwords4/android/app/src/main/res/menu/games_list_game_menu.xml
@@ -38,5 +38,7 @@
     <item android:id="@+id/games_game_invites"
           android:title="@string/board_menu_game_showInvites"
           />
-    
+    <item android:id="@+id/games_game_markbad"
+          android:title="@string/list_item_markbad"
+          />
 </menu>
diff --git a/xwords4/android/app/src/main/res/values/strings.xml b/xwords4/android/app/src/main/res/values/strings.xml
index 8d3879962..314b2867a 100644
--- a/xwords4/android/app/src/main/res/values/strings.xml
+++ b/xwords4/android/app/src/main/res/values/strings.xml
@@ -2306,6 +2306,8 @@
     <string name="processing_games">Processing games</string>
     <string name="list_item_select">Select</string>
     <string name="list_item_deselect">De-select</string>
+    <!-- Debug-only item for testing corrupt game warnings -->
+    <string name="list_item_markbad">Mark corrupt</string>
     <string name="not_again_dfltname_fmt">You are using the default
   player name \"%1$s\". Would you like to personalize with your own
   name before you create this game?</string>