The soundtrack of Command & Conquer: Tiberian Sun was released in 1999, bundled with the game certain editions, such as in the Platinum Edition and the Firepower bundle pack, which also contained the original Tiberian Sun and its expansion pack, Firestorm. When the time came to score the music for the Firestorm expansion pack, Klepacki and the producer decided that the music should be more upbeat and a return to the original style of the music of Command & Conquer.