|This article is written from the Real Life point of view|
Sector 5 (ARC) Low-Temperature Zone Area (セクター5（ARC）低温地帯エリア) is the theme that plays in the Sector 5 area of Metroid Fusion. It is a slow theme with what sound like chimes. The theme stops playing after Nightmare breaks free from containment.
The theme can be heard here: .