fg-optional-bonus-soundtracks.bin is a supplementary data file used in FitGirl Repacks
.bin files with unused audio for:
Optionality as Power – The term “optional” signals user agency. Unlike core game assets (executables, level geometry, textures) which are mandatory for functionality, this file exists at the threshold of choice. In an era of bloated downloads and mandatory day-one patches, optional content is a courtesy—a recognition that not every player wants the orchestral score or the chiptune remixes. To include an optional bonus soundtrack is to acknowledge that play is personal. The user who deletes or ignores fg-optional-bonus-soundtracks.bin loses no navigable game world, only an auditory layer. fg-optional-bonus-soundtracks.bin
fg-optional-bonus-soundtracks.binfg-optional-bonus-soundtracks.bin ranges from 800 MB to 4.5 GB. For a game you play competitively, you don't need 4 gigs of orchestral menus taking up space on your NVMe drive..bin file. Removing it forces the game to skip that indexing step.%localappdata%\[GameName]\Cache rather than the install directory. If you find it there, it is safe to delete as it regenerates upon launching the music player.If you are looking to save space and only care about playing the game, you can safely ignore or delete fg-optional-bonus-soundtracks