This file appears to be a for a specific version of the VR game BONELAB , likely from an unofficial source. File Details Filename: BONELAB.v25.01.2023.part1.rar

Since this file naming convention is common on third-party sites:

The safest and most stable way to play BONELAB is through the Meta Store or Steam .

.part1.rar indicates it is the first piece of a multi-part compressed folder. Important Instructions for Split Archives To use this file, you generally need to follow these steps:

Likely the update released around January 25, 2023.

You must have every part (e.g., part1, part2, part3) in the same folder before extracting.