Fight with up to 4 other players against the impending zombie horde. Cover, heal, revive, and protect your teammates.
Full drop in and drop out support including the ability to "pause" your character and let the AI take over.
To enable splitscreen, refer to this forum post.
Fight together...or die alone. 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, wildly violent psychopaths, attacking the uninfected on sight. One of the "lucky" few apparently immune to the sickness, you, unfortunately, are also trapped in a city crawling with thousands of the bloodthirsty Infacted. Together with a handful of fellow Survivors, you must fight your way to safety or die alone. A co-operative multiplayer action game from the makers of "Counter-Strike," Left 4 Dead is built atop the most advanced version of the Source Engine and introduces version 2 of Turtle Rock's artificial intelligence (A.I.) technology. [Turtle Rock Studios]
Splitscreen
The PC version of Left 4 Dead can be made splitscreen for two players by following these simple instructions posted at the Steam forum: http://forums.steampowered.com/forums/showthread.php?t=745113&highlight=splitscreen
This page contains co-op info for Left 4 Dead on the PC. All information about Left 4 Dead was correct at the time of posting. Information is subject to change. If you see any errors please email us.