Mafia

Mafia, also known as Werewolf, is a social deduction game created in 1986 by Dmitry Davidoff, then a psychology student at Moscow State University. The game models a conflict between two groups: an informed minority (the mafiosi or the werewolves) and an uninformed majority (the villagers). At the start of the game, each player is secretly assigned a role affiliated with one of these teams. The game has two alternating phases: first, a night-phase, during which those with night-killing-powers may covertly kill other players, and second, a day-phase, in which all surviving players debate and vote to eliminate a suspect.

Summary: Wikipedia, CC BY-SA 4.0