The string "nspupdate 12149397.rar" typically refers to a compressed update file in the NSP format (Nintendo Submission Package), which is the standard format used for digital titles and updates on the Switch. Understanding Nintendo Switch Updates (NSP)

Is it worth the upgrade if my game works?

Absolutely. If you are still on version 1.0.6 or 1.1.0, you are missing core logic fixes for the "Al-An" storage quest. The 12149397 update specifically addresses a script trigger in the Fabricator Caverns where the game would soft-lock when trying to construct the body vessel. In the community, this is known as the "Better end-game" fix.

Custom Game Modes: Options to toggle creature hostility, day/night length, and even a "vegetarian" diet.

While that specific filename looks like it may be associated with unofficial software distributions (like Nintendo Switch NSP files), the most recent official major update for the game was the 2025 Patch released in August 2025. Official Update Highlights (August 2025)