Tension Before a Confrontation (Metroid Fusion)



Tension Before a Confrontation, as named on the Metroid Prime & Fusion Original Soundtracks, is an ominous theme in Metroid Fusion. As implied by the title, it is heard when about to confront a boss character in the vicinity, often foreshadowing the presence of a boss character, and is heard for all boss rooms save for those of the Scientist (due to the character being fought during a countdown), the second Security Robot B.O.X. boss fight, the S.A.X. boss fight, and the Omega Metroid boss fight.

The theme can be heard here.