Multiplayer patch named the betrayal
In this patch you and another person plays co op but after 1 ingame day, you are both forced to kill each other. You get a certain amount of points depending on how you killed your partner or vice versa with the kill cam.

Whack off head with a mace = 10 points
triple slash with sword, leg, body, and head combo = 15 points
omega 2hsword body chopped in half(horizontal) = 12 points
Ultimate 2h axe body chopped in half(vertical) = 12 points
1000 slashes = 20 points
rip off head with your hands = 18 points
head gets punched off = 15 points
body gets burned alive = 10 points

What? That sounds like it has pretty much nothing to do with TES... You don't get "points" in these games...

No. and there's a thread for this somewhere.

http://www.gamesas.com/topic/1358980-official-tes-multiplayerco-op-thread/

Please use that topic for multiplayer discussion. Thanks for the link.