files contain the high-quality audio tracks of a game's soundtrack, which are kept separate from the main game data to save download space for those who do not want them. Installation Guide
Files like "fg-optional-bonus-soundtracks.bin" reflect gaming’s evolution from static experiences to fluid, player-shaped worlds. Whether through a dev’s hidden Easter egg or a modder’s passion project, they remind us that music is the soul of a game’s world —and now, players can be its composers too. fg-optional-bonus-soundtracks.bin
If you want, I can: