The acronyms in the filename identify the specific version and format of the game:

: The name of the website where the file was originally hosted.

: A compressed archive format that requires software like WinRAR or 7-Zip to extract the actual game file. About the Game

: Indicates the North American region version of the game.

: Refers to the file format used for installing software on a modified Nintendo 3DS console via tools like FBI.

: Stands for Shin Megami Tensei: Devil Survivor 2 Record Breaker .

: Stands for "Region Free," meaning the file has been modified to run on 3DS consoles from any region.