Microsoft has announced that a demo for the Xbox 360 version of Don King Presents: Prizefighter is now available on Xbox LIVE Marketplace, allowing you to try out this realistic boxing video game simulation that combines the realism of live action match-ups with the responsibility needed to build a career. The story is being told by a revolutionary sports documentary-style narrative never before seen in a video game. Developed by Venom Games, Don King Presents: Prizefighter is now available on North American retail store shelves for Xbox 360 - the DS and Wii versions are due to ship this Fall.