Whilst classic mafia does exist, the majority of the PokeCommunity's mafia games have some sort of theme or gimmick to them. For example, Nakuzami's "Faeries" mafia games take us to the magical land of Haven whilst the Supporter Mafia games are based upon the supporter system.
My question to you is, what are some interesting themes that you'd like to see future mafia games based on?
I haven't seen a Pokemon-themed Mafia in my time here, but there probably has been one in the past. Giovanni and Team Rocket vs. trainers, anyone? We could have a Nurse Joy medic, Officer Jenny detective, etc., should be doable. :D
Also, an Elder Scrolls Mafia would be cool! There are so many different factions, races and lore in it, it could go a lot of different ways.
Edit: Posted and looked at my theme, which made me think of Harry Potter mafia too - Voldemort and the Death Eaters vs. Dumbledore and the Order of the Phoenix, something like that. :P This topic kind of makes me want to start my own game now. If only I was good at creative writing.
I would really, really like to see an ace Attorney mafia. Not sure how it would be done, but it would have things like testimonies, evidence, etc. The stuff me and deceptio did in S3 mafia inspired it ^^
I think Juno listed some very good ideas. Others I would like to see could be some anime/manga themed, like Attack on Titan/SnK (Scout Regiment vs. Titan Shifters?) or Sword Art Online (any of the Clearing Guilds vs. Player Killers?)
Personally I'd really like a Pokemon one :P Been ages since I've played a Pokemon-themed mafia, and there's a lot of scope for creativity (Gym Leaders, Evil Teams, Legendaries...). But I think I'm sort of similar to MI in that although themes are cool in making things different, I love mafia overall so even without a cool theme I'd still want to take part where possible. :P
1 King, 1 Assassin, and rest of players are Guards. All the Guards know who the King is, but not who the other Guards are. King only knows they're King. Assassin has a 1 time attempt to kill the King. No night phases, just day phases where someone is voted to be executed. If the Assassin is voted, they get a last chance assassination attempt, and win if they get the King. King+Guards win if Assassin is executed before King is killed.
1 King (doesn't know anyone, wins if King + Guards >= Rebels)
X Guards (know who King is but not who the other Guards are, win if King + Guards >= Rebels)
2(X+1) Rebels (win if King is lynched)
Similar gameplay, no night phases, but no assassination attempt, it's just the Rebels want to Lynch the King, King+Guards want to outnumber Rebels