Mafia #52: Serial Killer Showdown
There will be a group of Mafia that may communicate outside the thread. Each night they can submit a person to be Hit. Mafia win when they are equal or greater in numbers than the Citizens + Serial Killer.
There will be a single Serial Killer. The SK is in it for themselves, they can align themselves with the Mafia or the Citizens or kill willy-nilly as they like. They do not have to kill someone every night, but they can if they so choose. The SK wins if they survive till either the Mafia or Town win the game.
There will be a Doctor that can protect one person nightly. This person will be immune to Hits from the Mafia or the SK. The Doctor can protect themselves.
The Citizens will vote to Lynch someone each day in an attempt to strike down the Mafia and a rampant SK. They can win the game by eliminating all the Mafia. They do not have to eliminate the SK to win.
Typically the townies win when all threats against the town are eliminated, meaning that the SK should also be lynched before the town can claim victory... This means the SK would only win when they're the last man standing...unless you're intentionally creating a serial killer/survivor hybrid role.