Left 4 Dead

Game Description: Set in a modern day survival-horror universe, the co-operative gameplay of Left 4 Dead casts four "Survivors" in an epic struggle against hordes of swarming zombies and terrifying "Boss Infected" mutants. Developed by Turtle Rock Studios and Valve, creators of the Counter-Strike and Half-Life games, the latest AI technology allows for multiplayer games of one to eight players. A new and highly virulent strain of the rabies virus emerges and spreads through the human population with frightening speed. The pandemic's victims become grotesquely disfigured widely violent psychopaths, attacking the uninfected on sight. As one of the "lucky" few apparently immune to the sickness, you, unfortunately, are also trapped in a city crawling with thousands of the bloodthirsty Infected. Alone, you're dead. But together with a handful of fellow survivors, you might just fight your way to safety.