Ultracopyright
Replaces Almost every soundtrack from the game (treat this as an playlist becuase that was what it originally was.) but then lazy ahh is using USTManager by ZedDev.REQUIRES USTManager @ https://thunderstore.io/c/ultrakill/p/ZedDev/USTManager/
Drop this folder into the USTs folder that USTManager generated, then enable the pack in the game's Audio settings. if its there