Slowly but surely, Valve is revealing more and more content they plan to put into their upcoming zombie co-op shooter sequel Left 4 Dead 2. At a new press event this week, Shacknews reports that Valve's promised all new multiplayer mode for the game is called Scavenge, a variation of the original game's Versus mode.

Just like in Versus, Scavenge has a four-player human team going up against a four-player "Special" zombie team along with hordes of regular zombies. The human players have to take 16 gas cans that appear in the levels and use them to fill generators. Each can used adds 20 seconds to the round's initial countdown clock of 120 seconds. Of course, the zombies still want to eat the humans and could even cause the gas cans to explode. The winning team is declared after six rounds with each team taking three turns for each side. Six Scavenge maps will be included in the final version of Left 4 Dead 2.

Valve still has some secrets to reveal in the game; they have yet to show the final two of the game's five campaigns.