Painkeep v3 - Blast your opponents with 3 times the Pain. Deathmatch mod - make other players "die." Disclaimer - this is a free product with no warranty - see disclaimer.txt for details. Number Six - welcome to the village.
Now this is truly a mod, an addition that is "IMPROVING" the game, not making it worse. I simply love the new amount of gore added into this game, and the "RPG"esque style of play makes it much more satisfying that the vanilla, I highly recommend this.