Sonic: Frontiers (xci)(asia).part1.rar

It looks like you are dealing with a specific split archive for on the Nintendo Switch.

You cannot open just "Part 1" on its own. You must have all parts (e.g., part1, part2, part3, etc.) in the same folder. When you extract "part1" using a tool like WinRAR or 7-Zip , the software automatically pulls data from the other parts to recreate the full .xci game file. Sonic Frontiers (XCI)(Asia).part1.rar

The file name indicates that this is the first part of a multi-part compressed archive. To use this file, you generally need to keep the following in mind: It looks like you are dealing with a