Files ending in .partX.rar are frequently used on "repack" or file-sharing sites to distribute the full game illegally.

: NIMBY Rails is an early-access railway management sandbox available on Steam .

: Files from unofficial sources like this may contain outdated versions (e.g., missing the v1.14 timetable overhaul ) or malicious software. 3. Shared Save Games

: A highly detailed save file can grow significantly, necessitating a split RAR archive for easier uploading to platforms like Google Drive or Discord. Summary of Game Specs

Are you trying to a specific mod, or did you encounter an error while trying to load a part of a split file?