Among Us is a multiplayer game for four to fifteen players.[6] Up to three players, based on the number of players and the game host's choice, are randomly[7] and secretly chosen to be the Impostors each round. As of 2023, five playable maps are available: a spaceship called "The Skeld", an office building called "MIRA HQ", a planet base called "Polus",[8] "The Airship", a setting from Innersloth's Henry Stickmin series,[9][10] and the Fungle, a mushroom jungle map.[11] The Crewmates can win the game one of two ways: either by completing all assigned tasks or by ejecting all Impostors. Impostors can likewise win in two ways: either by killing or ejecting enough Crewmates, so that the number of Crewmates matches the number of Imposters,[d] or by sabotaging a critical system on the map (provided the Crewmates do not resolve it in time).[e][8][12] At the start of the game, Crewmates are assigned "tasks" to complete around the map in the form of minigames, minipuzzles, and simple toggles, mostly consisting of maintenance work on vital systems such as fixing wires and downloading data.[13] Impostors cannot complete tasks but may pretend to perform them to feign appearance as legitimate Crewmates. Impostors, however, can perform sabotages, ranging from minor (such as disabling lights, limiting the Crewmates' vision) to critical (such as disabling oxygen generators), requiring immediate counteraction by Crewmates to prevent their deaths. Impostors may enter and traverse ventilation ducts (commonly known as "venting"), and kill nearby Crewmates. To help Crewmates identify Impostors, there are various surveillance systems on each map, such as security cameras on The Skeld,[14] a door log system with sensors in MIRA HQ,[15] and a vitals indicator in Polus that shows the living status of all players.[8] In addition, certain "visual tasks" provide animated cues, such as scanning oneself in the Skeld's medbay. As Impostors cannot perform tasks, Crewmates can use visual tasks to confirm their identity to nearby Crewmates.[16]