Deep Silver’s upcoming zombie video game, Dead Island, has been rated “M” for mature by the ESRB. The game will be released for PlayStation 3, Xbox 360, and PC on September 6, 2011 in North America and September 9th worldwide. Dead Island is a non-linear, open world game and features 4-player co-op, weapons customization, and upgradeable characters. In the game players are trapped on an island resort and must battle for survival against zombie hordes. Check out the latest Dead Island news on the official website.