You all live in the underworld, and all have one desire ; to eliminate all your competitors and become the undisputed don in your kingdom. Trouble is, it's a fine line between keeping allies, and becoming so big the authoritys become aware of your plans.
Like all your 'coleagues' you have security, and it will take an organised plan to knock any one of you off. But organise too many people, and the cops will surely catch wind of your plans.
The game is scheduled, and each night you pm me someone you want to kill. If EXACTLY X people conspire to kill the same person, that person dies. Otherwise no-one dies.
The number of conspiritors (X) required to make a kill will change as the game goes on and player numbers reduce.