: Region Free (playable on any console regardless of region). NSwTcH : Nintendo Switch.

Because this is a "part" file, you cannot use it on its own. You must follow these steps to access the actual game file:

: Mario & Sonic at the Olympic Games Tokyo 2020.

: Once you have the final .nsp file, it is typically installed on a modded Switch using homebrew applications such as Goldleaf or DBI .

: You must have all segments (part1, part2, part3, etc.) in the same folder. If any parts are missing, the extraction will fail.

: Use a tool like WinRAR or 7-Zip to extract "part1". The software will automatically pull data from part2 and all subsequent parts to create one single .nsp file.

The file is a compressed segment of a Nintendo Switch game ROM, likely Mario & Sonic at the Olympic Games Tokyo 2020 . File Breakdown

: Nintendo Submission Package, a standard file format for Switch games and updates.