Are you ready to jump back into Left 4 Dead 2? This Thursday the next set of downloadable content will be released. Called "The Passing," the content provides a new mission where the survivors from the first game meet the new set of characters from Left 4 Dead 2. Of course, that's not all.

Versus is now given support for bot-controlled Infected, a new type of zombie (the fallen survivor), the M60, the golf club melee weapon, and a new co-op challenge mode. There will be a lot to see and do.

The content pack will also add support for a new feature called "Mutations," a weekly bit of content that changes how the game is played. "These week-long runs of new gameplay modes range from 'Realism Versus' mode to 'Chainsaw Massacre,' which gives all players chainsaws with an unlimited supply of gasoline," Valve explains. "There are over 20 Mutations planned, each playable on all L4D2 Campaigns." You'll need the content pack to access the Mutations.

The content will be free for PC gamers, but will cost 360 gamers 560 Microsoft Points ($7).