From Valve (the creators of Counter-Strike, Half-Life and more) comes Left 4 Dead, a new kind of action game for the PC and Xbox 360™ that features single player, co-op and multiplayer game modes.
Set in the immediate aftermath of the zombie apocalypse, L4D offers four expansive "movie campaigns" that challenge you and your fellow survivors to battle thousands of swarming zombies as you travel across the rooftops of an abandoned metropolis, through rural ghost towns and pitch-black forests.