Unlock Dead Air campaign early by playing Left 4 Dead 2
Valve has announced via the Left 4 Dead blog that they will be releasing the Left 4 Dead 1 campaign, early if we meet their goals.
The user created Cold Stream campaign must be beaten by 20,000 players to help unlock Dead Air. Only then will get an early piece of the upcoming DLC.
Don’t have Left 4 Dead 2 on PC? Well, it’s 75% off today. That brings it down to $4.99.