Downloading game files (ROMs/NSPs) from third-party sites like ROMSLAB is considered software piracy if you do not own a legal copy of the game.
The file is a compressed archive containing a digital copy of the game Spiritfarer in the NSP (Nintendo Submission Package) file format . This specific format is used for installing games on a Nintendo Switch, typically through custom firmware or emulators. File Details & Context SPIRITFARER-NSP-ROMSLAB.rar
They are also the primary file type used for playing Switch games on PC emulators like Yuzu or Ryujinx . Critical Considerations you will find the .nsp file
The .rar extension indicates a compressed folder. Inside, you will find the .nsp file, which is the standard format for Nintendo Switch digital software. SPIRITFARER-NSP-ROMSLAB.rar