Faithless

Faithless is the fifth track in Halo 4: Original Soundtrack.

Overview
The track opens with distorted orchestral strings and percussion building up a melody, joined by guitar and horns as the melody. Strings takes over with a tense melody, then gradually simmer down. They build up with a suspenseful melody, later joined by percussion, and gradually fading to an end.

Appearances
The soundtrack can be heard playing:
 * In the campaign level Composer, when John-117 finds Jul 'Mdama's Covenant attacking Launch Bay 7 of Ivanoff Station.
 * In Prologue Terminal, when Jul 'Mdama and his fleet find Requiem in 2554 and the three years later.
 * In Episode 3, Chapter 1 of Spartan Ops, when Fireteam Crimson defends the area with UNSC gear.
 * In Episode 3, Chapter 2 of Spartan Ops, when Fireteam Crimson fights against the final wave of Covenant.
 * In Episode 4, Chapter 3 of Spartan Ops, when Fireteam Crimson initially arrives at "Fortress".
 * In Episode 4, Chapter 3 of Spartan Ops, when Fireteam Crimson arrives at "The Cauldron". This version is lighter, though it is followed by the full version.
 * In Episode 5 of Spartan Ops, Memento Mori, during the Halo: Infinity cinematic, when Jul 'Mdama is revealed being Catherine Halsey's informant and Thorne is translocated to Requiem.
 * In Episode 6, Chapter 1 of Spartan Ops, after Fireteam Crimson deactivates the shield door.
 * In Episode 7, Chapter 2 of Spartan Ops, when Fireteam Crimson returns to the hangar bay onboard.
 * In Episode 8, Chapter 2 of Spartan Ops, during the opening cinematic, when Fireteam Crimson's Pelicans arrive at "Cyclone".
 * In Episode 8, Chapter 3 of Spartan Ops, during the opening cinematic, when Fireteam Crimson arrives at "Warrens".
 * In Episode 8, Chapter 5 of Spartan Ops, briefly during the opening cinematic, when a Sangheili barks orders to his Unggoy subordinates.
 * In Episode 9 of Spartan Ops, Key, during the Halo: Infinity cinematic, when Captain Thomas Lasky contacts Fireteam Majestic.
 * In Episode 9, Chapter 4 of Spartan Ops, after Fireteam Crimson are ambushed at "Lockup", and they are attacked by Mgalekgolo.
 * In Episode 10, Chapter 1 of Spartan Ops, after Fireteam Crimson has destroyed the entrance to the Type-58 Harvester.
 * In Episode 10, Chapter 5 of Spartan Ops, briefly during the opening cinematic, when the Covenant are seen guarding the Harvest dig site.

Production notes
The track was initially composed by Neil Davidge, with additions from Andrew Morgan, who added counter parts to Davidge's original orchestration. Jeremy Wheatley performed audio mixing to the track, and, according to Davidge, it only took one attempt to finalize it.