Left 4 Dead 2's DLC came out today. The Passing is a new campaign with 3 chapters. It has some cameos by survivors from the original Left 4 Dead. I like the map a lot. Even better in my opinion in "Mutation". Valve made 20 different variations on the game to make versus more fun, they will cycle in a new one each week. Only two are known at this point, a game mode with chainsaws that never run out of gas, and this first week is Realism Versus. If you know what Realism is you know this is insane, but its pretty dang fun. Good updates.