The mention of a .rar file usually points toward the archival and backup community. For users managing their own game libraries, these archives serve as a way to compress the large NSP (Nintendo Submission Package) files, making them easier to store or transfer.
See you in the wild, and remember: hunger is just as dangerous as a Hyena. Outward Definitive Edition -NSP--Update 1.0.2-.rar
This specific file, "Outward Definitive Edition -NSP--Update 1.0.2-.rar," Outward Definitive Edition: A Comprehensive Review and Guide