Thanks to Left 4 Dead 2, Friday has become some kind of weekly masochistic holiday. This week proves no different, as the latest mutation, Iron Man, pits the survivors against the Infected with "no respawns, no restarts, no ammo, all tension." In other words, you get the ammo you start with, no one respawns and, should your whole crew bite the dust (or be bitten by dusty zombies), you'll have to start the entire campaign over again. Ouch.

In other news, the Left 4 Dead Blog also dropped some hints about upcoming DLC. Those who finished "The Passing" DLC will know that someone from the original Left 4 Dead heads off for the great Safe House in the sky (don't hit the source link if you'd like this to remain unspoiled). According to the blog, a forthcoming comic and DLC will explain exactly how the survivor kicked the bucket. We're no psychics, but we're guessing it was zombies.