Rocksteady will tomorrow release a new skin for Batman: Arkham City free of charge.

The Batman Inc. Batsuit skin launches on Xbox Live Marketplace, PlayStation Network and Games for Windows Marketplace tomorrow and you can download it for zero pence.

It's a thank you from Rocksteady to the fans, game director Sefton Hill wrote on the Batman: Arkham City website.

"We have had an amazing release of Batman: Arkham City and we wanted to thank you all for your incredible support before, during and after the game's release," he said.

Rocksteady has also revealed a cheat code which enables you to play using any alternate skin without having to complete the full game.

The code is: Left, Left, Down, Down, Left, Left, Right, Up, Up, Down.

Input the code on the main menu screen, after you have selected your save slot. You get audio confirmation after you successfully input the code, and when you continue your game you will get the option to select your favourite skin.