There are two teams; the innocents and the Mafia. The Mafia team doesn't have so many people, but the innocents have a vast majority. Each team has to try to eliminate everyone from the other team. The innocents can only kill someone by voting someone out during a day phase. The Mafia can choose to kill one innocent during a night phase. There are also separate roles that are used mainly at night, but only the bomber has an ability that is used during a day phase.