Eidos has announced that a demo for Batman: Arkham Asylum will release this week on Friday, August 7. The demo will be available on PS3, Xbox 360 and PC. It's set to feature the introduction of the game, in which Batman and Commissioner Gordon attempt to return the Joker to Arkham Asylum, only to have the villain turn Batman into an unwilling new inmate. The demo will also allow players to unlock character bios and "get a sneak peak at some of the infamous foes that Batman will encounter within the cavernous and macabre confines of Arkham Asylum."

Batman: Arkham Asylum is set to hit North America and Europe on August 25 and August 28, respectively.

This article was originally published on Joystiq.