Although Valve is pretty close to releasing the "Dead Air" campaign for Left 4 Dead 2, they still have some testing to run through, and they are calling all Left 4 Dead 2 gamers on Steam to give them some help. Valve created a new achievement called "Connecting Flights," and if 60,000 people earn it (via playing a complete Versus game in "Dead Air") the studio will unlock the beta version of "Blood Harvest" on Steam "the next weekday." Again, it has to be a complete game, so as Valve says, "you can't rage-quit."
