Valve has announced the next batch of downloadable content for Left 4 Dead will be released today.
The Xbox 360 version of the Survival Pack is due to launch at around 2am PST, which is 10am GMT in the old money. The PC version will follow at some point later in the day.
The pack is free to download, hooray. It will introduce a new multiplayer mode titled Survival plus two Versus mode campaigns.