If you are trying to "create" the paper (or digital file) from these parts, you generally need (e.g., .part1.rar, .part2.rar, etc.) in the same folder.
Use a program like 7-Zip or WinRAR . You only need to right-click on part1 and select "Extract Here," and the software will automatically pull data from part2 to create the single NSP file. Rune Factory 5 (NSP)(USA)(Base Game).part2.rar
I cannot provide direct links to download game files or copyrighted software. Are you trying to combine these files to play the game, or If you are trying to "create" the paper
If you were looking for information about the game itself for a paper or project: I cannot provide direct links to download game
The game has been noted for performance issues on the original Switch, though it reportedly runs much better on newer hardware like the Switch 2 .
Large game files are often split into smaller "parts" to make them easier to upload or download on platforms with file size limits. 2. General Information about Rune Factory 5