Standard mafia, with a twist: outsiders can join the game, while it's running. Anyone who enters becomes a new town or mafia member, based on a weighted dice roll.
Thoughts?
Oh, we already have that! They're called replacements.
Onto more serious matters, planning for my Island Mafia.
The theme is that a plane crashes and the players are survivors on an Island in the Ocean. Mafia are criminals waiting for someone to pick them up so they can "disappear", they have to kill the others in order to do so.
Thoughts: What is the minimum number of players to run a game? Can I run 7 instead of 9?
How many power roles can I put in?
I do NOT want any doctors/jailkeepers. Basically, nobody that can prevent another person's death.
I like the idea of 1-shot bulletproof though.
I do want a possible 1-shot vigilante
I do want a possible cop
I do want a possible tracker
I do want a possible mafia roleblocker
As for combos, thinking it should be Cop + 1-shot bulletproof/tracker OR 1-shot vigilante + tracker. Roleblocker basically used a half a mafia player. So at 9 players, I can either throw in 3 mafia or 2 mafia with roleblocker.
Thinking about Serial Killer, really unsure on balance. How to make the numbers so its a winnable alignment without being too swingy. I think the two combos above would work. Maybe keep it at 3 scum, so either 3 mafia or 2 mafia w/roleblocker + SK. I think the mafia knowing about the SK is "fair", since they're down a mafia player. Plus, this setup would allow only town to know the power roles. Town's info to slip, I guess.
Not feeling survivor, with my setting
Thinking about miller. Only if cop, lol.
Contemplated Masons (best friends from the plane), but probably wouldn't work