Martin O'Donnell – Halo: Combat Evolved - Original Soundtrack

Halo 3: ODST Original Soundtrack - Music - Halopedia, the Halo wiki

Halo [Original Soundtrack] by Martin O'Donnell (CD, Oct-2003, Sumthing Distribution) for sale online

Martin O'Donnell Videos : : Free Download, Borrow, and Streaming : Internet Archive

Martin O'Donnell talks about the way Halo Anniversary music wasn't recorded the way he wrote it. (Clip is from Noodles Interview with Marty) : r/halo

Halo CE Theme Sheet music for Piano (Solo)

Bungie fires Halo composer Martin O'Donnell (update) - Polygon

Xenoarchaeology - Song by Brian Trifon, Lennie Moore, Paul Lipson & Tom Salta - Apple Music

HALO TRILOGY O.S.T. - Halo Trilogy (Original Game Soundtrack) - Music

Halo: Combat Evolved (Original Soundtrack) — Martin O'Donnell