Halo's chant-like main theme debuted with Halo: Combat Evolved in 2001, composed by Martin O'Donnell and Michael Salvatori, and it quickly became one of gaming's most recognisable musical signatures. Short excerpts circulate widely on soundboards because the choir alone signals something epic without needing any visuals. Like the Metal Gear Solid alert or classic Minecraft damage cues, it has become a shorthand in edits and memes for high-stakes or triumphant moments, which keeps the seven-second clip in steady use years after the games released.