Halo 3 released in 2007 as Bungie's finale to the original Xbox trilogy, with music composed by Martin O'Donnell and Michael Salvatori. The Gregorian-style chant became the sonic signature of the franchise, instantly recognizable to millions of players. Over the years the theme spread far beyond the games, appearing in memes, sports highlight edits and epic reveal videos across YouTube and TikTok. It endures because few sounds capture heroic sci-fi scale so efficiently, making any clip feel larger than life within seconds.