|This article is written from the Real Life point of view|
Boss Gamma appears to be an original composition, not based upon any of the songs composed by Ryoji Yoshitomi for Metroid II: Return of Samus. While this track is not confirmed to be a remix of any preexisting Metroid songs, some of its melody is reminiscent of the Parasite Queen battle theme, and its driving beats and bass line are evocative of the Security Robot B.O.X. battle theme.
- When Gamma Metroids are encountered in superheated rooms, this theme does not play. Instead, a remix of the Lower Norfair theme continues to play during those battles. The same applies for Boss Alpha when Alpha Metroids are battled.