DeathsPlay in your browser or a download.
Its a platformer type game with a bunch of booby traps to kill you. Big deal. Whats interesting is that when you are killed, your corpse/body parts are left in that spot and uploaded to a database. So anyone else that plays will see your (and everyone elses) corpse. This is what serves as a warning to where the traps are located. So you can navigate past them and...mark the next one.
Pretty interesting concept.