Standard Nintendo 3DS game files are typically encrypted by Nintendo to prevent unauthorized distribution and use. For enthusiasts using emulators like Citra, these files must be to be readable by the software.
For more detailed technical guides on handling 3DS files, you can refer to resources like the Citra Wiki or 3DS Hacks Guide .
: Place the decrypted .3ds file in your emulator's designated game folder.
: It is widely recommended to only use ROMs of games you legally own to stay within the bounds of copyright law.