Mafia (Russian: Ма́фия, also known as Werewolf) is a party game created in the USSR by Dmitry Davidoff in 1986, modelling a conflict between an informed minority (the mafia) and an uninformed majority (the innocents). 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: "night", during which the mafia may covertly "murder" an innocent, and "day", in which surviving players debate the identities of the mafiosi and vote to eliminate a suspect. Play continues until all of the mafia has been eliminated, or until the mafia outnumbers the innocents.
Dmitry Davidoff (Russian: Дми́трий Давы́дов, Dmitriy Davydov) is generally acknowledged as the game's creator.