BTW, HC KFers, right now Nation Red is 80% off ($2) Steam. It's a top down co-op "dual stick" shooter that's similar to KF in both theme and tone. It doesn't have a permanent progression system (you level up in a match and that's it) but it is a lot of fun. Grahame and I played a bit of it a while ago. I think it'd work especially well with coordinated team effort with a Vent sever. You know, just like KF.