Sweet bat-mother of all things bat-holy! This Friday will see the release of a demo for Batman: Arkham Asylum. The demo will be offered on Xbox Live Marketplace for Xbox 360 and PlayStation Network for the PlayStation 3. Err, and PC please? Apparently you can score details on how to download the PC version of the demo on the Official Site, but I can't find said details. Sad panda.

The Batman: Arkham Asylum™ demo opens as the DARK KNIGHT and COMMISSIONER GORDON return The Joker back into confinement at ARKHAM ASYLUM. But things soon fall apart as THE JOKER gains the upper hand and springs a trap, setting Arkham Asylum’s occupants upon Batman. The demo offers gamers a taste of the fierce FreeFlow™ combat system, the cunning stealth of the Invisible Predator™ mechanic, and the feeling of becoming the WORLD’S GREATEST DETECTIVE as they navigate Arkham Asylum’s imposing Intensive Treatment facility. Players can unlock character bios, as well as get a sneak peak at some of the infamous foes that BATMAN will encounter within the cavernous and macabre confines of Arkham Asylum.

Featuring amazing graphics within an intense, immersive setting, Batman: Arkham Asylum™ exposes players to a unique, dark and atmospheric adventure that takes them to the depths of Arkham Asylum – Gotham City's psychiatric hospital for the criminally insane. Gamers will move in the shadows, instigate fear amongst their enemies, and confront The Joker and Gotham City's most notorious villains, including Harley Quinn, Bane, Killer Croc and Poison Ivy, and the newly revealed Scarecrow, who have taken over the asylum.