I was thinking of running a game called Duality Mafia. Basic premise is each player would get the same role PM as another player, but one of the players in each pair would in reality have a different role. For instance, 2 players might think they're Doctors, but in reality one of them might be a Bodyguard, Angel, Elite Vanguard, CPR Doctor, or even an Anti-Doctor. Some of the second roles would be better, some of them would be worse. It's very arbitary, although I'll choose for maximum fun.
Note that Townie and Mafioso are considered the same role for my purposes (So there might be pairs that're like a Mafioso + an Ascetic who thinks he's a Townie or a Townie + a Godfather who thinks he's a Mafioso). I won't do anything like Doctor-Vigilante pairs, but weird shit is possible, such as Roleblocker-Banshee, Serial Killer-Random Thing from Beyond, or even Jack of all Trades-MUP. Yes, I would pull that kind of shit, watch me. Half the fun will be guessing what your real role is.
I still haven't decided how to reveal to the players that their role is different from the one on their PM. Obviously I'd tell dead players instantly, although I'd probably have them roleflip the role they thought they were, only revealing their true role the next twilight. Then something like twilight Day 3, I'd tell everyone what their REAL role is. All this is up in the air, that's why I'm asking here. If anybody has a different win-con than the one in their role PM, I'd tell them such twilight Day 2. It's kind of weird to have a Survivor who thinks he's a Jester, eh? Note that I probably won't do this, but I might include something last minute that I wind up regretting, so I have to plan for it.