If you want to extract specific dialogue or sounds, you'll need specialized tools because these files are proprietary.

On the ferry, as the silhouette of the island shrank, Jonah played the files once more. The files didn't offer neat endings—only fragments that kept insisting that names be spoken aloud. He typed them into a ragged online post when he reached signal: an archive released back into the world, a small attempt to make those whispers permanent.

If you want to modify the audio files, you can use Audacity:

: Some users "disguise" other language packs by renaming them to sound_english.dat/fat to bypass locked menu options.