So during one of Steam's many holiday blow-outs, I bought the game "Killing Floor" on a whim.

I've clocked nearly 150 hours on it so far. I cannot stop playing it. No matter how hard I try to take a break from it... I need more.

Perhaps I'm compensating for a distinct lack of co-op survival/shooter games in my life. The last decent one I played was RE5's Mercenaries, which my friend and I played the FUCK out of.

Whereas Mercenaries got old rather fast,...