This soundtrack is based off of the Hotline Miami 2 Remorse remix from the Digital Special Edition. I did not make this music nor will I claim to have done so.
There's literally millions of tutorials on how to install BLT. I won't be explaining it.
Once you have BLT installed, simply drag BeardLib into your mods folder, and then drag the folder for the soundtrack into Payday 2\assets\mod_overrides Boot up the game, the main menu option is disabled. the only way to know it worked is to start up a heist, scroll to the bottom of the list, and see if there's an option called "Remorse"
Hopefully you enjoy this, it's my first soundtrack so the cuts might be pretty bad, but my friend and I enjoy it.