Left 4 Dead The Sacrifice DLC Trailer

Valve has just released a trailer for “The Sacrifice” DLC, which is in development for both Left 4 Dead and Left 4 Dead 2. As fans of the franchise will know, “The Sacrifice” is going to explain why Bill, one of the original four survivors from the first game, is dead in “The Passing” map, which was released for L4D2 a few months back.