12th Annual Interactive Achievement Awards Winner: Outstanding Achievement in Online Game Play and Computer Game of the Year Set in a modern day survival-horror universe, the co-operative gameplay of L4D casts four Survivors in an epic struggle against hordes of swarming zombies and terrifying Boss Infected mutants. The Survivor Co-op Game Mode is played out across four sprawling campaigns, set in urban and rural environments. Each campaign has an over-riding team objective, and is comprised of five large maps. The campaigns link together to tell the story of the Survivor's escape to safety. The team of four Survivors may be comprised of 1 to 4 human players, allowing for single player and multiplayer co-op games.

• New technology dubbed “the AI Director” is used to procedurally generate a unique experience each time the game is played. Just as in Hollywood films, the Director calls for new monsters, sounds and action as it tailors the game play experience based upon the team's performance.
• Addictive co-op action game play from the makers of Counter-Strike and Half-Life
• Advanced artificial intelligence drives both friendly and un friendly creatures to dynamically create intense single-player, co-op, and multiplayer experiences every time the game is played
• 20 new maps, 10 new weapons, 4 sprawling “Movies”
• Match making, stats, ranking, and awards system drive collaborative play
• Designer's Commentary mode allows gamers to go “behind the scenes” of the game.
• Powered by Source and Steam

Please Note: The copy of this video game is pre-owned and has been verified functional on original hardware by Papa Joey’s Collectibles. Minor scratches present on disc. Original game case and manual included. Does not include Survival Pack DLC.