http://pc.ign.com/articles/607/607334p1.html
This has now gone up from being a game I knew very little about, to one of my most hyped PC games. Created by the same guys who made Diablo, this is essentially Diablo II in First Person! The levels are randomly generated and there are like over 100 different weapons which can get different random mods, just like Diablo! I'd recommend reading that preview, but it sure sounds totally awesome. If it is as addictive as Diablo II, then I'll fear for my social life for the rest of my life.