: Use 7-Zip or WinRAR for the best results.
This likely stands for "Decrypted," meaning the file is ready for use in emulators like Citra without needing further conversion. RF4-USA-DecrTD-Ziperto.part1.rar
This is the first segment of a multi-part archive. You will need all subsequent parts (part2, part3, etc.) to successfully extract the game. Extraction Guide : Use 7-Zip or WinRAR for the best results