A .rar file is a compressed archive containing the .3ds or .cia game file.
The file has been "decrypted," meaning the Nintendo 3DS encryption has been removed. This allows the game to be played on PC or Android emulators like Citra , rather than requiring a modified ("hacked") physical 3DS console. EOU-TMG-(UNDUB)-DecrTD-Ziperto.rar
This indicates the ROM has been modified to include the original Japanese voice acting while retaining English text. This is highly desired by fans who prefer the original audio over dubbed versions. This indicates the ROM has been modified to
If you're asking about this for technical or archival reasons, I can also explain: How to What the differences are between this and the original Where to find other similar modified ROMs Here is an informative breakdown of what this
This refers to the source website that provides these modified ROMs, which frequently hosts decrypted and undubbed versions of Atlus games.
Here is an informative breakdown of what this file represents:
Based on the file naming convention, refers to a specific, modified ROM file for the Nintendo 3DS game Etrian Odyssey Untold: The Millennium Girl .