Toribash
I watched some other videos too, the PvP just looked really under-developed and unorganized.

Do they have bracketing or support roles for underleveled character or something?
So pretty much the same system used in every MMO ever >_>

But it seems troublesome to be a new player and get killed randomly... Is there no factions?
> attacking players makes you lose reputation
> once you fall below a certain point you are an 'outlaw'

I'm sure there are MMOs that don't use this system. I don't think WoW does for instance.