From Valve (the creators of Counter-Strike, Half-Life and more) comes Left 4 Dead, a co-op action horror game for the PC and Xbox 360 that casts up to four players in an epic struggle for survival against swarming zombie hordes and terrifying mutant monsters.
Step into the aftermath of a zombie apocalypse in Left 4 Dead.
Blast your way through the walking dead as you guide the survivors through four "movies" rife with ghost towns, dark forests and more as you attempt to make your escape. With each movie putting five maps forward for you to face, you'll have to use all your cunning to keep your team alive.
Left 4 Dead has a truly unique gameplay experience thanks to the new technology imposed known as the AI Director, which alters the severity of the zombie attack to cater to your current performance.
Boasting single-player, co-op and multiplayer, Left 4 Dead is renowned for its action-packed gameplay addictive nature, making it an instant classic. Along with the game's campaign, you can compete 4v4 in Versus Mode, in which you can take control as either zombie monster or survivor. Or, see how long you can endure the infected in Survival Mode. With 20 maps, 10 weapons and much, much more to take in, Left 4 Dead is the ultimate zombie experience.
META: Dive head first into the aftermath of the zombie apocalypse in Left 4 Dead, courtesy of the creators of Counter Strike and Half Life.

• Addictive single player, co-op, and multiplayer action gameplay from the makers of Counter-Strike and Half-Life 
• Versus Mode lets you compete four-on-four with friends, playing as a human trying to get rescued, or as a zombie boss monster that will stop at nothing to destroy them. 
• See how long you and your friends can hold out against the infected horde in the new Survival Mode 
• An advanced AI Director dynamically creates intense and unique experiences every time the game is played 
• 20 maps, 10 weapons and unlimited possibilities in four sprawling "movies" 
• Matchmaking, stats, rankings, and awards system drive collaborative play 
• Designer's Commentary allows gamers to go "behind the scenes" of the game 
• Powered by Source and Steam