If you've gotten a few Batman skins for
Batman: Arkham City and haven't finished the game yet to use it, here's the cheat code that'll let you don that costume
courtesy of Rocksteady. In the main menu, press the following:
Left, Left, Down, Down, Left, Left, Right, Up, Up, Down
You'll hear and audio cue and then be presented with the option to select the skin of your choice. Pretty cool!
If you don't have any skins, well Rocksteady's giving you one for free soon. The skin below will be available to all platforms sometime soon to add to your collection. It's a great Thank You and Holiday present from the folks at Rocksteady.