This game has been Greenlit by the Community!

The community has shown their interest in this game. Valve has reached out to this developer to start moving things toward release on Steam.

Reduction: The Alien Swarm Campaign
XFunc_CaRteR  [developer] Sep 27, 2012 @ 1:32pm
"This little girl survived longer than that with no weapons and no training." Reduction Feedback: The Gamers (and Veterans) Have Spoken...