A few weeks ago Valve announced that it would be releasing a new campaign for its zombie shooter Left 4 Dead 2 titled Cold Stream. Today the campaign is now available for people to download in beta form.

The campaign, created by community mapper Matthew Lourdelet, will be tested out before it's officially released as part of a new Left 4 Dead 2 DLC package from Valve. As previously announced the DLC will contain Cold Stream as well as Left 4 Dead 2 versions of the three remaining campaigns from the original Left 4 Dead that have yet to be ported. There's still no word on when the DLC will be released.