This site explains the rules the best. That site explains it as werewolves instead of mafia, and how to play it in person, but through PMs you can play on a forum just as well. Basically, we need a group of people to volunteer first. I was thinking 9 for now.
The 9 people will randomly be assigned a role through PM from me.
After everyone has received their roles the game starts.
We start during Day (the other site says Night, but that is when there is an even amount of people) and the group of 9 people all discuss and vote for someone to be lynched from the town. When a majority is achieved (5 votes) the person is lynched (eliminated from the game) and we go to Night. The person killed will also have their affiliation known (Mafia, townsperson, or investigator).
During Night, the Mafia will conspire and pick someone to be killed during the night. They will PM me that person's name. Also during the night, the investigator will PM me someone they want to know about, and I will tell them if they are a townsperson or a member of the mafia.
If the townspeople eliminate the Mafia they win. If the Mafia makes it so that there is an equal number of Mafia and townspeople, the Mafia wins.
The strategy comes in discussing who to vote off. The Mafia will be acting as townspeople, but if you spot suspicious behavior (such as always agreeing with someone, or vice versa) then maybe they're hiding something. The investigator can tell people what they find out, but doing so might expose themselves and get them killed by the Mafia.
Some important rules:
- Townspeople and the investigator cannot contact each other through PMs about the game. The Mafia must contact each other to decide who they will kill during night however.
- No editing posts! - If you say something you didn't mean to, that's your mistake. Check your posts before hitting submit. Obviously there is no way to control this so you have to take it upon yourself to play by the rules
- People not playing, or already eliminated must remain silent - The remaining members of the game are supposed to pickup clues by themselves. They can lie or say whatever they need to. Having outsiders point things like this out ruins the game
One other thing is about voting. You vote by simply saying,
"Official vote: member name"
and you can change your vote (in a new post) at any time by saying,
"Unvote: member name
New vote: member name"
however once a majority is achieved you cannot change votes. Whoever had the majority is eliminated.
So maybe there will be no interest but it's worth a shot. It really is fun when you get into it. If you're interested just say you want to play, and if there are questions feel free to ask.