BattleBlock Theater is a cooperative platform game developed by The Behemoth and released in 2013, in which players guide prisoners through trap-filled stages while a narrator comments on their progress. The menu theme plays before any level begins, and its cheerful, cartoonish sound became familiar to players who spent hours in menus, customising characters and choosing stages. As gameplay clips and nostalgic retrospectives spread online, the theme kept returning as shorthand for the game's playful, chaotic spirit and for early 2010s indie gaming.