The level-up chime comes from the Assassin's Creed games, where a bright musical cue marks progression and rewards the player for reaching a new stage. As clips from the series spread on video platforms and soundboards, the short cue became a shorthand for levelling up in any context, not just in the game itself. This louder edit is popular because it stays clear over commentary and background music, which is why creators keep reusing it for wins, upgrades and milestone moments years after the original games.