Scripts.rpa
The actual game data is packaged in four Ren'Py archive files: scripts.rpa, images.rpa, audio.rpa, and fonts.rpa. Any of these files can be replaced to change the relevant contents of the game. However, in practice, only scripts.rpa usually needs to be replaced, as references to objects in the other archives can be changed in the script files without modifying the original assets.
scripts.rpa
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