![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJuscnLDWhBZ1wDmi8WeSS6C2KjN2z1vQK3fw708KmZBxRK_45XmDYdUqBATkKl0KMth6JSo4ASIQAjKoZIkScOY8l7dC0CNFqRPs9e6zDIU1FVUuO0IfWM3Sxv2upfkAV3Ny9PZfIDw/s200/leftfordead.jpg)
Set in the immediate aftermath of the zombie apocalypse, L4D's survival co-op mode lets you blast a path through the infected in four unique “movies,” guiding your survivors across the rooftops of an abandoned metropolis, through rural ghost towns and pitch-black forests in your quest to escape a devastated Ground Zero crawling with infected enemies. Each "movie" is comprised of five large maps, and can be played by one to four human players, with an emphasis on team-based strategy and objectives.
New technology dubbed "the AI Director" is used to generate a unique gameplay experience every time you play. The Director tailors the frequency and ferocity of the zombie attacks to your performance, putting you in the middle of a fast-paced, but not overwhelming, Hollywood horror movie.
*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.
Cheats and Trainer