This sound comes from Rocket League, the vehicle soccer game that became a major online multiplayer hit after its 2015 release. The kickoff countdown is one of the game’s most recognizable audio cues because players hear it at the start of every round. It spread through gameplay clips, montages, and short-form edits where creators use the countdown to signal that a payoff is seconds away. It remains popular because even outside Rocket League, the cue instantly suggests pressure, timing, and a big moment about to happen.