If you liked Super Meat Boy, this is by the same devs. Messed up/morbid humor, procedurally-generated dungeons, and a lot of fun. *Note: If you clear your browser cache, you'll lose your stats/collection data.

This is basically Tribes until Tribes: Ascent comes out.

Like RPS said in their review, you're going to die. You're going to die a lot. But when you manage to take out the sniper who's been slaughtering your entire team with one perfectly executed shot, the sense of accomplishment is great. Brutal, semi-realistic FPS that picks up where MoHAA's multiplayer left off.