I know this has been out for a while (now ) but is anyone else playing this? Apparently it started out as a mod for UT2K4 (still available on modDB), and went retail. ($20 on Amazon)
First of all, there's a massive sale on Steam, Killing floor included (they say it'll be even cheaper on 3rd of July).
Secondly, I have 2 gift passes for Killing Floor to give out, valid till July 27th. Anyone interested? PM me please with your Steam ID if you're willing to get one.