Hmm. I'm thinking of a combat system for a roguelike. It would be fairly fancy - you bave targeted hit locations, and active defenses, and stuff like that. Depending on your skills, you get a random assortment of possible attacks you can make against someone. Some attacks will target hit locations, or have bonuses/penalties to hit, or to damage, or to your opponents chance to defend, or to your next chance to defend, or give you free movement, or whatever. I'm not actually sure how that would work with multiple enemies, though. Honestly, the idea might work better for a text adventure game than for a roguelikes? :/