Not part of the official OST so I found it and uploaded it myself.
High quality gamerip shamelessly ripped from Koma's YouTube channel.

18.5 Advanced Research

Scorched

get into your bodies, out of the fog, loving the ambient

eerie

In the ethereal glow where souls embark on sacred journeys, Spiritual Pilgrims wander through veils of divine luminescence. Rays of enlightenment pierce the shadows of doubt, echoing the harmonious call of inner awakening. Surrender to the radiant path that guides the faithful, illuminating the essence of transcendent unity.

Spiritual Pilgrims

Waves of Relaxation

Counter-Terrorism

Operation Iceberg

The Stealth Music 2018 Album is here! https://arcticstealth.bandcamp.com/album/stealth-music-2018

Jungle

Battlefield 1 Soundtrack Apocalypse Attackers Advance

Music by:
Harry Gregson-Williams (01)
Stephen Barton: (02~6)

Matrix / Runout: COD4 SOUNDTRACK
Matrix / Runout: 32401-1-45
Matrix / Runout: 071107 1432
Other: IFPI 17C5

Music Staff (from in-game credits)
---------------------------------
Theme by Harry Gregson-Williams
Produced by Harry Gregson-Williams
Music by Stephen Barton
Score Supervisor: Allison Wright Clark
Ambient Music Design: Mel Wesson
Score Performed by London Session Orchestra
Scoring Engineer: Jonathan Allen
Scoring Mixer: Malcolm Luke
ProTools Engineer: Jamie Luker, Scrap Marshall
Orchestra Contractors: Isobel Griffiths, Charlotte Matthews, Todd Stanton
Orchestrations by David Buckley, Stephen Barton, Ladd McIntosh, Halli Cauthery
Copyists: Ann Miller, Ted Miller
String Overdubs by The Czech Philharmonic Orchestra
Artistic Director: Pavel Prantl
Guitars: Costa Kotselas, Peter DiStefano, John Parricelli, Toby Chu
Electric Violin: Hugh Marsh
Oud, Bouzouki: Stuart Hall
Hurdy Gurdy: Nicholas Perry
Horn Solos: Richard Watkins
Percussion: Frank Ricotti, Gary Kettel, Paul Clarvis

Score recorded at Abbey Road Studios
Music mixed at the Blue Room, Los Angeles, CA

Modern Warfare (Complete Score)

All Targets Destroyed

I am Avery Alexander, a composer from New York. I am the creator of Stealth Music, as well as a producer of various genres. Contact me at xarcticsilence@gmail.com for inquiries.

R&D

Avery Alexander