Most of the music of X was written by Daniel Finney and Alexei Zakharov. X3: Terran Conflict contains hours of awesome ambience, orchestral, vocal, and electronic music from all the previous games, in an easily accessible file. The X-Superbox has a couple hours of fan-written tribute music.
- The Terran Conflict menu theme
. Orchestral music while in orbit around Jupiter! - Kingdom End's theme. Considered one of the best songs in the game. It was remixed for Albion Prelude.
- Seizewell.
- Home of Light's theme.
- The HUB.
- Think from Terran Conflict.
- The Xenon theme is something quite remarkable to hear when commanding a fleet of capital ships against a half-dozen Xenon capitals, several frigates and corvettes, and an obscene amount of fighters.
- Albion Prelude's Earth Orbit Battle theme definitely defines epic space battle.
- Then there's this little track from Albion Prelude.
- The BGM for the trailer, "Birth of a New Era", is excellent.
- "The real love", a fan-written song included in the X-Superbox.
- Getsu Fune's theme, ranked near the Kingdom End theme as one of the best songs.
