From Halopedia, the Halo wiki
Album:
Halo: Combat Evolved Anniversary: Original Soundtrack
Composer(s):
Martin O'Donnell and Michael Salvatori (adapted by Brian Trifon, Lennie Moore, Paul Lipson, and Tom Salta)
Length:
1:36
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Fragments
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Unfortunate Discovery
Heretic Machine is the thirty-sixth track (Disc 2 Track 19) in Halo: Combat Evolved Anniversary: Original Soundtrack.
The track is an arrangement of Tron, an unreleased track from Halo: Combat Evolved and its offical soundtrack.[1][2]
Random Slipspace Trajectory • Bravery, Brotherhood • Installation 04 • An End of Dying • Pale Rider • Yawning Chasm • A Private Service • Rock in a Hard Place • Flotsam, Jetsam • Captain, My Captain • Suite Fall • Demons and Heretics • Exfiltration •