: If you are playing on a PC, you will typically need to "decrypt" the file or use a specific emulator like Citra that can handle the format.

: To use this on a physical 3DS, you must have Custom Firmware (CFW) installed. You can then copy the .cia file to your SD card and install it via the FBI app .

: This is the file format used to install games, updates, or DLC onto a Nintendo 3DS console using custom firmware tools like FBI.