: Software like 7-Zip or WinRAR will automatically detect the other parts (including your part5.rar ) and stitch them together into the final game folder.
If you are missing any parts or if one is corrupted, the extraction will fail with a "Volume is missing" or "CRC failed" error. A.Way.Out.part5.rar
Are you having trouble or are you getting a specific error message during extraction? : Software like 7-Zip or WinRAR will automatically