The musical score to StarCraft was composed by Blizzard Entertainment's composers. Glenn Stafford composed the Terran and Protoss in-game themes, while Derek Duke, who was a contracted composer at the time, wrote all the in-game music for the Zerg. The cinematic scores were composed by Stafford and Hayes. Hayes also collaborated with Stafford on one of the Protoss in-game tracks. Tracy W. Bush provided additional support in composing.