Stygia music from "Metal: Hellsinger" game. Edited to fit with payday 2 soundtrack.
(Control/Anticipation/Assault): https://www.youtube.com/watch?v=cpJ0jBTdP70
(Stealth): Stealth is from various story cutscene musics of the game. https://www.youtube.com/watch?v=incfWbas91A (5:43 - 6:27, 6:47 - 7:27, 17:58 - 18:54)