The Mission Passed cue comes from Grand Theft Auto III, released by Rockstar Games in 2001. It became one of the most recognizable completion sounds in gaming because the game was hugely influential and the jingle played after key objectives. Over time, players and editors reused it in montages, streamer clips and memes as a quick way to signal success. It still works well online because the meaning is immediate: the goal is done, the reward has landed, and the moment deserves a little fanfare.