Rocksteady Would like to Thank You, the Fans
Arkham City dev, Rocksteady, would like to thank all the Batman: Arkham City fans out there for such a great year by offering a free download to the Batman Inc. skin. That’s right. Completely free of charge!
In addition to the free skin, game director Sefton Hill would like to give you a free code for even more skins for use right at the beginning of the game:
[P]ress the following combination on the Main Menu screen (after you have selected your save slot):
- Left, Left, Down, Down, Left, Left, Right, Up, Up, Down.
You will get an audio confirmation and when you continue your game, you will get the option to select your favorite skin.
(via: Game Informer)