The .part3.rar extension indicates this is the third part of a set. You cannot extract the game data from this file alone; you must have all parts (e.g., part1, part2, part3, etc.) in the same folder.

This is a "Cartridge Image" format used primarily by Nintendo Switch emulators (like Yuzu or Ryujinx ) or hacked consoles with custom firmware (CFW) like Atmosphere . Unlike NSP files, which represent eShop downloads, XCI files are digital backups of physical game cartridges.

Be cautious when downloading split archives from unofficial sources, as these are often used by piracy sites and may contain malware or corrupted data. Always verify the integrity of the files with a checksum if provided by the source. INFORMATION | Sonic Frontiers | SEGA

Users playing the XCI version on emulators initially reported issues such as visual glitches and long loading times, though these were largely resolved by emulator updates and game patches like the Final Horizon Update .

To access the .xci file, you typically open only the first part ( part1.rar ) using a utility like WinRAR or 7-Zip . The software will automatically pull data from the subsequent parts to reconstruct the single large game file. Context and Risks