Rocksteady today said they were offering a skin of Batman from Grant Morrison’s Batman Inc. for the support off the fans for Batman: Arkham City. They also announced that playing with a new skin at any time involves a simple code entered on the Main Menu screen after you have selected your save slot: Left, Left, Down, Down, Left, Left, Right, Up, Up, Down.
“You will be able to download the skin tomorrow from Xbox Live Marketplace, PlayStation Network and Games for Windows Marketplace,” said Sefton Hill – Game Director at Rocksteady Studios. “We’ll be sure to let everyone know exactly when the skin are available.”
Source: community.batmanarkhamcity.com {link no longer active}