"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.