Stickicide
All right, here's the game: Stickicide-3, at one of my favorite sites, Armor Games. The point to this game is to die. As often as possible, as violently as possible. It actually took me a couple of tries to figure that out.
You have a stick man, unlimited lives, and a 3-D maze to run through, full of ways to die in bloody, gory stickman horror. The game is timed, and when it starts, you can just start running. Don't bother looking for a way out of this deadly stick-world; there isn't one. Just keep running, and try to look for all the ways to kill your stickman. You get points every time he dies.
You can crash a car, crash a rocketship, run across a giant circular saw, run into a giant wood chipper, get crushed by giant plungers, simply fall too far, jump onto spikes, get shot by a laser beam, get hit by a giant fist, fall into the green kung-fu guy's pit... this list is nearly endless.
The game is timed. At the end, your score is displayed, and you are insulted. I scored 8050, got a D ranking, and was told, "You can do better. Nobody sucks that much."
This is definitely a game for sick minds. Fortunately, my inner child is a twisted little bastard. If yours is too, try this out.