L4D2 community successfully completes challenge, Dead Air coming July 22
A challenge too little.
Valve promised to unlock the Dead Air map from the upcoming Cold Stream DLC if the Left Dead 2 community achieves 20,000 ‘Stream Crosser’ achievements by Sunday. But it seems Valve totally underestimated the amount of free time and dedication for free content gamers have, as the number was achieved within four and half hours after the announcement.
To their word then, Valve announced it will be releasing Dead Air on July 22. The devs are “going to try and release it as early as possible”, however the map needs further spit and polish and more internal testing before it’s pushed out the door.
As for the Xbox 360, Valve said that once the campaigns are ready, they will go into the certification process and then release, however no specific date was given.