Among Us is a social deduction game from InnerSloth, first released in 2018 and widely popularised in 2020, in which crewmates complete tasks around a spaceship while trying to identify impostors. Several tasks are split into stages, so players hear a distinct partial-completion cue when one stage is done and another remains. That small cue spread beyond gameplay as streamers and editors reused it to signal incomplete progress, and it remains useful because it instantly reads as a checkpoint in a format many viewers already recognise from the game.