An NSP file is the standard digital format for Switch games. It contains the game ROM, icons, metadata, and required updates.
The game is likely listed in the eShop, allowing for instant digital access without a physical cartridge. Key Considerations for 2026 Sunwards Switch NSP (eShop)
If you are encountering issues finding or playing the game, it is best to check the official Nintendo Support page for eShop updates. To help you further, are you asking about: this specific game? How to install a downloaded NSP file ? An NSP file is the standard digital format for Switch games
Nintendo Switch games are generally not region-locked, allowing Sunwards purchased on the Japan or US eShop to function on a console in another region. Sunwards Switch NSP (eShop)