Halo 3 DOOM Sound Files

Halo requires FMOD data to be dragged and dropped into a directory to allow for custom sounds in mods. Currently, the custom sounds must be installed separately and are not installed by subscribing to the mod on the Steam Workshop.

Installation is simple:

Download the FMOD files

Back up the files in your ODST 'fmod' directory, typically "Steam\steamapps\common\Halo The Master Chief Collection\halo3odst\fmod\pc"

Drag and drop the files in the 'pc' folder in the zip into the 'pc' folder of your 'fmod' directory

Replace any existing files

If you have any audio issues, simply restore your backed up fmod files.

Thanks for Circuitbreaker for helping with the fmod and AlyxGMusic for writing the soundtrack.