KILLING FLOOR 2 IS A THING AND ITS COMING TO STEAM EARLY ACCESS.

No release date as of yet, but you can bet your ass I'm picking this one up.

http://www.pcgamer.com/2014/05/08/killing-floor-2-exclusive-first-look-co-op-fps-horror-with-the-most-advanced-gore-system-ever/

http://www.pcgamer.com/2014/05/09/killing-floor-2-how-tripwire-aims-to-design-gamings-most-realistic-guns/

I posted instructions on how we can all play Terraria together without the need for hamachi or the necessity for lan to host. In the Discussions.

-Spleenter