: These files are generally used with modified (jailbroken) Nintendo Switch consoles or PC emulators like Ryujinx or Yuzu. They allow users to install content without using the official eShop. Legal and Safety Risks :

: Signifies the Japanese region version of the content. Digital assets on the Switch are often region-specific; Japanese DLC typically requires the Japanese base game to function.

: This is a specific file extension used for Nintendo Switch Packages . It is the format used by the Nintendo eShop to install games and updates.