|This article is written from the Real Life point of view|
Sanctuary Fortress is the theme of the area of the same name in Metroid Prime 2: Echoes. Giving off a "mechanical" feel, it is also one of the unlockable songs in the ingame Multiplayer, unlocked when Samus restores the Energy Controller of the Sanctuary Fortress and reports back to U-Mos. The later portions of the Fortress play an alternate version of this theme, with some of the instruments removed. In Metroid Prime Trilogy, the song is available in the Soundtrack Gallery, costing one Silver Credit.