What I kinda imagined is a map: Middle of it is the battleground.
Players go all out on eachother. Everyone against all.
Once you get killed, you get spawned someplace outside the battleground and will be unable to compete any more in that round.
There will be three rounds. The person to be the last one standing is the winner. He get's an award, and won't be able to compete in the next rounds. The rest of the people will be able to compete in the next rounds.
So... good or bad idea?XD