|This article is written from the Real Life point of view|
The Metroid Prime Theme is, as the name implies, the main theme of Metroid Prime. It is also featured in the Opening/Menu (Metroid Prime) song in Super Smash Bros. Brawl. The track includes crackling and squeaking noises, possibly relating to Phazon. While being its own song, it incorporates the iconic notes from the Title theme of the original Metroid. On the Metroid Prime & Fusion Original Soundtracks, this theme is simply called Title. Aside from the Title Screen, it also plays in the Concept Gallery for the game.
The theme is present in Metroid Prime 2: Echoes Bonus Disc, where it is used in The Metroid Chronicle while playing a movie with clips of Prime. Metroid Prime Trilogy also features the theme as one song that can be purchased in the Soundtrack Gallery. Part of the theme plays on the Title Screen and Samus Data Screen of Metroid Fusion.
The theme can be heard here.