Random Slipspace Trajectory

Random Slipspace Trajectory is the first track (Disc 1 Track 1) in Halo: Combat Evolved Anniversary: Original Soundtrack.

Overview
The track is an arrangement of Opening Suite from Halo: Original Soundtrack. However, the Bungie logo musical theme in the introduction has been replaced by the opening synth effects from the later track Honest Negotiation Suite.

Halo: Combat Evolved Anniversary
The music in the track plays in place of their Opening Suite counterparts in Halo: Combat Evolved Anniversary:
 * The Gregorian chant variation plays in the campaign level The Truth and Reconciliation, during the cinematic in which Jacob Keyes is rescued, when Cortana talks about Halo possessing a religious significance to the Covenant.
 * The Gregorian chant plays plays in the main menu of Halo: Combat Evolved Anniversary.
 * The space theme plays in the opening cinematic of the campaign level The Pillar of Autumn. It then plays again during the campaign level Two Betrayals, while John-117 is flying a Type-26 Banshee to the second phase pulse generator.

Halo: The Master Chief Collection
The Gregorian chant is the first piece to play in the main menu of Halo: The Master Chief Collection. It is followed by two Halo 2: Anniversary tracks: Not a Number and Unwearied Heart.

Production notes
The name Random Slipspace Trajectory alludes to the Cole Protocol, which stipulates that, when retreating from the Covenant, UNSC ships must enter Slipstream space with randomized vectors not directed towards any human worlds. The was originally intended to make a random slipspace jump following its retreat following the Fall of Reach, but Cortana surreptitiously guided the ship to the Soell system and, ultimately, to Installation 04 instead.