AI Director 2.0: Advanced technology dubbed The AI Director drove L4D's unique gameplay – customizing enemy population, effects, and music, based upon the players’ performance.
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Each of the five new campaigns contains at least one new uncommon common zombies which are exclusive to that campaign.
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This co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns. Set in the zombie apocalypse, Left 4 Dead 2 (L4D2) is the highly anticipated sequel to the award-winning Left 4 Dead, the #1 co-op game of 2008.