Left 4 Dead

Left 4 Dead is an upcoming multiplayer co-operative survival horror FPS game developed by Turtle Rock Studios which is now part of Valve Corporation. The game has been built using Source engine and will be available on PC and Xbox 360. Certain Affinity is responsible for the Xbox 360 version of the game. Left 4 Dead puts four human playable or AI controlled survivors of an apocalyptic pandemic against hordes of the Infected. Regular Infected are controlled by the game AI, while human players can control up to four mutated Boss Infected with special abilities. The goal of Left 4 Dead for the Survivors is to help each other make it through a level to safety. Infected players must cooperate to stop them.

The expected release date for Left 4 Dead is November 4 2008. The game was first revealed in the Christmas 2006 publication of PC Gamer UK with a six-page article describing a playthrough at Valve's headquarters. A teaser was released with The Orange Box. The game was first playable at the Showdown 2007 LAN in San Jose and at QuakeCon 2007.