Them_and_us_v1.0.8-flt.part5.rar -

This file ( part5 ) is one part of a multi-part RAR archive (e.g., part1, part2, etc.). All parts are required to be in the same folder to decompress the game files.

You must have all parts (part1 through to the final part) present in a single directory. Them_and_Us_v1.0.8-FLT.part5.rar

This indicates a scene release by FAiRLiGHT, which typically includes the full game and a crack to bypass DRM. This file ( part5 ) is one part

Use archiving software like WinRAR or 7-Zip on the first file ( .part1.rar or .part01.rar ) to extract the full content. To assist you further, I would need to know: Are you having trouble extracting the file ? Them_and_Us_v1.0.8-FLT.part5.rar