. If you are looking for the CIA file (which is the installable package format for the 3DS), it is important to note that the official Nintendo eShop for the 3DS was discontinued in March 2023.
: To install a CIA file, you usually place it in a folder on your SD card and use the FBI homebrew application to install it. Once installed, the CIA file itself can be deleted to save space. Mutant Mudds 3DS (EUR/USA) CIA eShop
Since the official store is no longer active, here is what you need to know about "Mutant Mudds" in that format: Once installed, the CIA file itself can be
: The "EUR/USA" tag refers to the region-specific versions of the game. While a modded 3DS is typically region-free, it is generally best to match the CIA region to your console's region to avoid potential compatibility or save-data issues. Mutant Mudds 3DS (EUR/USA) CIA eShop
: A .cia file is used to install games directly onto the 3DS HOME Menu, typically on a modded console using a tool like FBI . You can learn more about how these files function in the 3DS ROMs & CIA Files Guide .