: Use WinRAR or 7-Zip to extract the .cia file from the .rar archive. Transfer : Copy the extracted .cia file to your 3DS SD card.

CIA files are installer files that can be installed on a 3DS SD card. Here's some more information about .3DS files and CIA files: What does RF stand for in NSW releases on torrents?

The file is a compressed archive containing a Nintendo 3DS game distributed by the ROM site Ziperto . Based on common naming conventions used by this group,

: Once installed, the game will appear as a new gift box icon on your 3DS Home Menu.

: A compressed archive format. You will need a tool like WinRAR or 7-Zip to extract the actual .cia file inside. How to use this file:

: This is the internal shorthand or code for the specific game. While "M" often refers to major franchises (like Mario or Metroid ), this specific code frequently points to Metroid: Samus Returns or Mario & Luigi: Dream Team .

What's the difference between 3ds files and CIA files? : r/3dspiracy