Installation 04 is the 4th track in the Halo: Combat Evolved Anniversary Original Soundtrack. It is the re-mastered version of the original Halo Theme. The ending resembles to both MJOLNIR Mix from Halo 2 and One Final Effort from Halo 3.
The last 35 seconds of Installation 04 is the Siege of Madrigal.
List of music heard in the Halo series
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