When OFF (2025) was revealed, the question was asked:

Will the original soundtrack be available?

And to this, the fine people at Fangamer said:

No.

This mod intends to replace the remastered soundtrack with the original Alias Conrad Coldwood soundtrack.

This mod aims to recreate the original soundtrack by utilizing the Flac format soundtrack previously published by Alias Conrad Coldwood. [archive.org] I manually cropped and clipped the higher quality soundtrack to match the original 1:1, giving this mod a higher quality version compared to how the original sounded while retaining the original loop points. Think of it as just an HD version of the original.

1. Open Steam
   
2. Right-click on OFF in your library
   
3. Select "Manage" -> "Browse local files"
   
4. Navigate to: "OFF_Data\StreamingAssets\aa\StandaloneWindows64\"
   
5. Find the file: 'music_assets_all.bundle'
   
6. Download the mod file: 'music_assets_all.bundle'
   
7. Overwrite and replace the file in: "OFF_Data\StreamingAssets\aa\StandaloneWindows64\"
   
8. Ensure the file name is exactly: 'music_assets_all.bundle'

1. Open Steam
   
2. Right-click on OFF in your library
   
3. Select "Properties"
   
4. Navigate to: Installed Files
   
5. Left-click on Verify integrity of game files
   
6. The 'music_assets_all.bundle' file is now overwritten with the original

Source is from the previously published itch.io page, [ettewtf.itch.io] which has the download to the 'music_assets_all.bundle' at the bottom of the page.

I previously developed and tested this on Steam Deck (desktop mode), but if there are any issues, report it in this guide, the discussion, or the itch.io page. [ettewtf.itch.io]