|This article is written from the Real Life point of view|
Title (Metroid) is the theme on the Title Screen in Metroid. The opening notes of the theme have been reused in multiple subsequent themes (such as the Metroid Prime Theme), many of them being Title Screen themes, but in another instance it was used as an introduction for the Metroid Prime Battle theme.
The version in Metroid Prime Hunters is slower, darker and the notes are higher-pitched. The version in Metroid Fusion is slower, more brooding and features beeps, arranged against the scene of Samus Aran's Gunship crashing into an asteroid belt. A remix of the original version from Metroid appears in Super Smash Bros. for Wii U on the Pyrosphere. Composed by Kohta Takahashi from Bandai Namco, this version incorporates part of Samus Aran's Appearance Fanfare at the beginning and the ending theme from Metroid at the end. The Famicom Disk System version of the theme appears in Nintendo Land, when selecting a mission from the Metroid Blast gate.
The original version can be heard here, the Fusion version here, the Metroid: Zero Mission version here, the Hunters version here, the Nintendo Land version here and the Super Smash Bros. for Wii U version here.
The Super Smash Bros. version of the song is included on the blue CD of the Smashing Soundtrack that was a Club Nintendo bonus for registering the Nintendo 3DS and Wii U games.