In a post on the Left 4 Dead blog Valve have announced that if 20,000 people earn the Stream Crosser achievement (for finishing the Cold Stream campaign) by next Sunday they'll release the Left 4 Dead 2 version of original Left 4 Dead campaign Dead Air early on July 22nd.
Valve are describing this an an extension of their usual testing process, where the whole company gets a chance to bug test a new game shortly before release and prizes are given out. Cold Stream has been developed publicly, so this time we get a taste of what the Valve testing process is like.
Valve's Steam page currently lists a second mystery game alongside Deadlock, sending Half-Life 3 theorists into another frenzy of speculation
Activision will send you alarmingly detailed data for every single Call of Duty match you've played in the last 4 years if you ask, and players are using it to figure out their mysterious SBMM rankings
