SHAME ON YOU
But I suppose you should be informed. You can either look here:
http://en.wikipedia.org/wiki/Mafia_%28party_game%29#Basic_gameplay ,
or here:
http://forums.utopiatemple.com/showthread.php?s=c6899689cbbfd85c8e45f175fa3350bc&t=72871 ,
or listen to my description.
In the game, each player is given a role, of "Mobster", "Townsperson", or something else depending on which additional roles we choose.
The game has two phases: Night and Day. The game starts during a Night phase, and switches between the two until the mafia or townspeople win/lose.
Night:
When night begins, all players will send the moderator (that's me!) a PM, depending on your role. If you are a Mobster, you PM me someone you want to kill. If you're a townsperson, you do absolutely nothing, and pray you don't die a horrible death.
Day:
When day begins, the moderator (that's me!) will say what happened during the night (the results of what happened after everyones PMs have been looked at), including who died (or if nobody died). Afterwards, all remaining players vote on who to lynch under suspicion of being a mobster, and then that person is killed. Once they die, the Night phase begins again.