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Dead Air beta available in Left 4 Dead 2 on Steam today
As Valve promised, those who partake in zombie slaughter wholesale on Steam in Left 4 Dead 2 may now access an updated version of the original Left 4 Dead campaign, Dead Air. Beta access to Dead Air was promised as an incentive to the community for playing through the Cold Stream campaign (also in beta) and unlocking the subsequent completion achievement, Stream Crosser. In a post on the Left 4 Dead blog, Valve reveals that the fourth and fifth maps in the Dead Air campaign have been changed a bit and that the developer "tried something new" when it came to the Scavenge map. The full Cold Stream DLC is currently slated to launch this summer on both Xbox 360 and PC.
Left 4 Dead 2's 'Dead Air' DLC coming on or before July 22
You did it! You achieved the goal of playing a ton of Left 4 Dead 2, in sufficient numbers to unlock more Left 4 Dead 2. Valve challenged the community to get the "Stream Crosser" achievement 20,000 times by completing the Cold Stream campaign, and after 24 hours that achievement had been achieved 60,774 times. As a result, Valve is releasing the L4D2 version of the L4D "Dead Air" DLC early, as promised. The initial announcement said July 22 -- now Valve is saying July 22 at the latest and intends to release the content as soon as it's finished.
