"A storm is approaching."

This uses CustomOST by Nate. https://modworkshop.net/mod/27359

Stealth
https://www.youtube.com/watch?v=TwJvQ8pelPY

Control / Anticipation / Assault
https://www.youtube.com/watch?v=PL3EJKtNpLU

My first dynamic custom OST. Folder goes to mods\CustomOSTTracks.