The Serial Killer is a role in TBT Mafia. They can speak and vote, and have additional abilities.
Serial Killers are able to kill one player each night. Their goal is to be the last player standing.
There are no modifiers.
The Serial Killer role was featured in the following games:
- TBT Mini Mafia VII: Bioshock - Unrest in Rapture
- TBT Mini Mafia VIII: Pleasure Cruise
- TBT Mini Mafia XIII: Bird Mafia II - Attack of the Ostrich
- TBT Mini Mafia XIV: My Little Mafia
- TBT Mini Mafia XV: Pokémon Colosseum
- TBT Mini Mafia XVI: RuneScape's King of the Dwarves
- TBT Mini Mafia XVII: Kissing to be Clever
- Currently none.
- TBT Nub Mafia I: Twitch Plays Newbie Mafia
- TBT Nub Mafia II: On The Run
- TBT Nub Mafia III: Captain Flint's Gold
- TBT Nub Mafia IV: Hijinks in Sugar Rush
- TBT Unofficial Mafia XVII: Ryan's Third-Party
- TBT Unofficial Mafia XX: Mafia Disconnected
- TBT Unofficial Mafia XXXV: Reindeer Mafia
- TBT Unofficial Mafia XXXVII: Game of Thrones - A Crown for a King (as a Serial Killer/Lyncher)
- TBT Unofficial Mafia XXXVIII: Scummy Awards (as a Bus Driver Serial Killer Suicide Bomber)
- TBT Unofficial Mafia XLI: Papers, Please
- TBT Unofficial Mafia LIII: Make Mafia Great Again
- TBT Unofficial Mafia LXIV: Imprison the Criminals Mafia
- TBT Unofficial Mafia LXVII: Miraculous Ladybug Cultists