I love playing L4D2 when it gets late at night (like right now). It is the epitome of mindless violence because the entire goal of the game is to blast and/or slice your way through hordes of flesh-eating zombies. It's challenging, suspenseful, and you can defend yourself with a katana. There's also some strategy in there. I don't know how I'll defend liking this game but if anyone has any insight into why it's appealing, help me out. I'm just running out of things to post and I'm tired. If you haven't tried this before, next time you play, turn off the background music, keep the sound effects on, and put on your favorite Beatles album. It's awesome.