Those ready for a taste of the Dark Knight will be satisfied. A demo is being released this Friday, August 7th, for the Xbox 360, PS3, and PC. This demo comes with the intro part of the game being playable, as well allowing you to unlock character bios, and find out some of the nemesises(nemesiss, nemesi?) of Batman. Be on the lookout for the retail game hitting shelves August 25th.