There are 3 Imposters, you have to get them out if your a crewmate, but, you can choose if you want to be an imposter. Imposters' goal is to eliminate all crewmates, by either sabotaging and stalling till the ship breaks from their sabotage, or killing them. They can vent to get around the map faster. The Crewmates' goal is to finish their tasks and ejecting the imposters to win, if all of them die, the Imposters win.