Left 4 Dead 2 (abbreviated L4D2) is a single-player and multiplayer cooperative survival horror first person shooter game developed by Valve Corporation. The sequel to Left 4 Dead (2008) and the second game in the Left 4 Dead series, it was released for Microsoft Windows and Xbox 360 in November 2009, Mac OS X in October 2010, and Linux in July 2013. It is the sequel to Left 4 Dead, and was built using Source engine. . The AI Director drove L4D's unique gameplay - customizing enemy population, effects, and music, based upon the players' performance. Nov 16, 2009 ยท L4D2 promises a satisfying and uniquely challenging experience every time the game is played, custom-fitted to your style of play. Left 4 Dead 2 is a 2009 first-person shooter video game developed and published by Valve. Next generation co-op action gaming from the makers of Half-Life, Portal, Team Fortress and Counter-Strike. New from Valve® — creators of Counter-Strike®, Half-Life®, Portal™ and Team Fortress® — Left 4 Dead™ 2 is a new game that casts up to four "Survivors" in an epic struggle against hordes of swarming zombies and terrifying "Boss Infected" mutants. [1][2] L4D2 promises a satisfying and uniquely challenging experience every time the game is played, custom-fitted to your style of play.

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