One Night Ultimate Werewolf is the classic party game Werewolf, with no player elimination, no moderator, and all played in about ten minutes.
Players take actions during the night and then during the day phase must decide which player to kill. If a werewolf dies, the village wins; if a villager dies then the werewolves win. It's even possible that no one is a werewolf, in which case players can win by all agreeing not to kill anyone.