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

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Install Notes:

1. Unpack release
2. Mount image or burn it
3. Install game
4. Play the game

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It is a Full rip with link of 95 Mb!!: