The only legitimate methods to obtain an NSP are by purchasing the game directly from the Nintendo eShop (which automatically downloads the official, encrypted NSP to your system) or by creating a personal backup dump from a legally purchased cartridge using a homebrew-enabled console—though the latter exists in a legal gray area depending on jurisdiction.
The game was officially released on , for multiple platforms, including the original Nintendo Switch and the Nintendo Switch 2 . Digital Format: The NSP File little nightmares iii nsp