Hello! Im Antiex! This is my first mod so... yeah idk what to put here. Anyway ENJOY!!!
To install the OST you need Custom OST Mod: https://modworkshop.net/mod/27359
Put the folder in CustomOSTTracks.
Stealth: https://www.youtube.com/watch?v=tMwbUdt43k8
Assault: https://www.youtube.com/watch?v=y1n0h2U-B-U