Atari today announced the release of the Xbox 360 demo for The Chronicles Of Riddick: Assault On Dark Athena, the game developed by Starbreeze Studios for PS3, Xbox 360 and PC. Previously announced as a remake of The Chronicles of Riddick: Escape from Butcher Bay, The Chronicles of Riddick: Assault on Dark Athena now features a brand new full-length campaign, an entirely new chapter in the Riddick saga and, for the first time, online multiplayer modes. The game will hit the store shelves on April 7th, 2009, in North America and April 24 in Europe. The PS3 demo will be available via PlayStation Network later this month. Three new screenshots have been uploaded to our gallery.