Wololo comes from Age of Empires II, released in 1999, where priests chant it while converting enemy units to the player's side. The chant became one of the game's most recognisable audio cues, repeated by players during long matches and later clipped for YouTube videos, streams and reaction edits. Its popularity grew because the sound is instantly funny even without game context, suggesting a slow, unstoppable change of allegiance. Today it remains a shorthand for persuasion, conversion and mind control in gaming and meme culture.