The mutation of this week's Left 4 Dead 2, already active for several days, is "Gib Fest", which provides players dell'M60 unlimited ammunition, weapon introduced by the additional content "The Passing", which will will pass almost undisturbed among the hordes of Infected zombies and special, including the dangerous Tank. Please note however that if you play the campaign "Luna-park Lugubre", reached the fifth and last act of the game will crash, and returns to the waiting room: to be able to deal with, you create a room with the option "Local server hosting "instead of" Official Dedicated Server.