Arms Law, Claw Law, Character Law.... All rolled up into one big mass (mess) called Rolemaster. One of my players figured out the rolling a 66 on the critical hit chart was almost always an insta-kill and, surprise surprise, started rolling that number several times a session. Was killed by a 10x10x10 stone block trap that required you make 100% success on a virtually impossible Athletics check. "OK, you're 75% successful. You have managed to get everything clear of the block that's above your waistline. Sadly, that means everything below that point has been completely crushed and you bleed out in one minute." It was from a published LotR dungeon.