Could be the 2.0 version of the forest exploration game NIVA by Follow the Feathers.
Before downloading, clarify what this specific file contains, as "Niva" can refer to several different projects:
This guide explains how to handle "Niva v2.0.rar," a compressed archive file typically containing game modifications, software updates, or small-scale indie games.
Always scan .rar files with updated antivirus software before opening, as they can occasionally hide malicious scripts or executables. 3. Extracting the .RAR Archive
Windows and macOS do not natively support .rar extraction, so you will need a third-party utility.