Left 4 Dead 2 Announced and E3 2009 Trailer

Sequel to co-op thriller coming this holiday
Valve announced today Left 4 Dead 2 (L4D2), the sequel to co-operative multiplayer thriller developed for PC and Xbox 360. Introducing the AI Director 2.0, L4D's dynamic gameplay is taken to the next level by giving the Director the ability to procedurally change weather effects, world objects, and pathways in addition to tailoring the enemy population, effects, and sounds to match the players' performance. Set for release on November 17, Left 4 Dead 2 features new Survivors, boss zombies, weapons, and items. Press 'read more' for details - a trailer is now locally mirrored.