Among Us is a multiplayer game for four to fifteen players, although recommended for at least five.[11] Up to three players are randomly[12] and secretly chosen to be the Impostor(s) each round. As of 2021, a round can take place on one of four maps: a spaceship called "The Skeld"; a headquarters building called "MIRA HQ"; a planet base called "Polus";[13] or an airship based on Innersloth's Henry Stickmin series called "The Airship".[14][15] The Impostor(s) win(s) one of two ways: either by killing most of the crew (to the point that they're equal in number) or by sabotaging a critical system on the map (provided the Crewmates don't resolve it in time). The Crewmates likewise can win one of two ways: either by completing all tasks or by identifying and ejecting all Impostors.[13] Games can also end by players quitting the match if doing so fulfills any win condition (if a Crewmate quits the game, their tasks are automatically considered completed).[16][17][18]