Both the Sega Saturn and PC editions have slightly remixed soundtracks. On Chapter 2, there is a reference to the Space Shuttle Challenger disaster, as the words "Challenger, go at throttle up", spoken by Richard O. Covey from the mission control room only seconds before the explosion, can be heard three times before the music loops. These words do not appear in the arcade version; a snickering laugh is heard instead. The title, and boss themes are reversed on the PC port as well.