- This article is about the theme from Metroid Prime. For the theme from Return of Samus and Samus Returns, see SR388 Underground.
Ancient Chozo Ruins (チョウゾ古代遺跡) is a theme in Metroid Prime. It is slow and brooding, compared to the more upbeat, main theme of the area. This theme is heard in the Ruins when first entering them, and when exploring the rooms leading up to and after the Hall of the Elders, near the Antechamber where the Ice Beam is kept. It will continue playing here, while the regular Chozo Ruins theme begins playing in the other side of the Ruins when the Plated Beetle has been defeated.
The theme can be heard here.