: 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 stands for CTR Importable Archive , a specific file format used to install games, updates, or DLC directly onto a Nintendo 3DS Home Menu . M_LDT-USA-CIA-RF-Ziperto.rar
: This stands for Region Free . While the original ROM was likely the USA version, it has been patched so that it can be installed and played on a 3DS console from any region (EUR, JPN, etc.). : A compressed archive format
: This indicates the game is the North American (United States) version of the software. M_LDT-USA-CIA-RF-Ziperto.rar