We did this in an old forum I went to. The object of the game is to try to beat up everyone else such as sending rockets after them, blowing up their house, etc. There are no rules as to the weapons you can use, it can be anything from baseball bats to an army of zombies. You can even team up with other people, or use bribes.
Actions are used like this: *runs away*
Speech is used like normal text.
Ready and go!
*Builds a fort out of iron with a jelly cannon to defend it.*