Left 4 Dead for PC Download or Free 24-Hour Trial

* 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.
* 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