Here is the Wikipedia article on the game.
Here are Smogon's terms of Mafia.
Please read/skim through one of the provided links before joining the game, or have me explain the game to you.
Here's short summary:
Mafia, a psychologically-themed game, is quite a popular party activity of cooperation; it is literally a game of the people who are informed against the people who aren't informed. This game has its own metagame - which includes techniques based on deception, truces, and lying.
This mafia game is designated for URPG members only! If you wanna play, you better sign up and be constantly active!
For a little spice, roles will be Pokemon themed.
1. Mafia wins if it outnumbers the villagers.
Villagers win with Mafia and Rogue(s) eliminated.
Rogue(s) wins if all villagers are eliminated.
(If the Rogue(s) and the Mafia both fulfill their agendas, they would both win. In lingo terms, this is considered a "joint victory".)
2.Each day and night will be 48 hours long.
Night 0 will occur first, opening at 0:00 GMT-5 (21:00 GMT-8) and Day 1 will occur 48 hours after at 0:00 GMT-5.
Just before the first night, I'll send ya'll roles PMs.
3. At day, you are allowed to vote No Lynch.
4. Once you are out of the game, you may not post on this thread nor contact the current roster over the topic of PokeMafia any other way. You can be reported for an infraction.
5. Stay active, or be replaced by a substitute.
6. Once the game starts, you can not refer to this game via VMs. Please keep all conversation within PMs, this thread, or AIM.
7. No posting on the thread at night! Please communicate instead via AIM or PM.
8. If you are to ever change your name on the duration of this game, please notify me!
9. Want to falsify a role? PM me for a fabrication.
10. Screenshots may not be used within this thread.
11. Lastly, if you're not playing Mafia, you better not be posting on this thread!
4. @Team Evolution
9. @-Pichu Boy-
10. @Derpeh Hoovez
11. @The pokemaster
13. @Scourge of Nemo
24. @LS the Door Mat
25. @Phantom Kat
(Once game starts, PM me if you wanna sign up as a substitute)
This is an example of a Role PM
You are Crustle. You are the humble Stone Home Pokemon. Everyday, you slowly strut around the village everyday carrying your massive... burdens. Your impenetrable shell allows you to shelter others from harm as you settle down at night. Every night, you may send to me a PM saying "Withdraw [Username]". By withdrawing your target into your hard shell, they will be protected through the entire night from any sort of fatal harm. Your role is valuable and important for the survival of the village. You and the village will win if the last survivors of the game are villagers.
Be careful and cautious of using your ability on targets. By withdrawing a mafia member into your shell, they will be able to kill you that night as you sleep.
Once a person has died, their role PM will be revealed to the entire game in this thread. The lines below the "---" border would sometimes.. mysteriously vanishes when the person's role is revealed either through death or investigation.