Left 4 Dead 2's eagerly awaited DLC, titled "Cold Stream", has gotten it's release date today. The content pack features the new community-made campaign, Cold Stream, along with classic maps Death Toll, Dead Air, Blood Harvest and Crash Course.
Valve also teased some new announcements but didn't go into detail. With the update going out at the same time (also for the PC), all of the mutations will be available at all times. This will allow players to choose to match into games playing Taannkk!, Gib Fest, or even a user created mutation like Confogl.
The release date is set at July 24th for PC and August 3rd for Xbox 360.