If the file size is significantly smaller than the actual game (which is roughly 6–8 GB), it might be a "repack" (highly compressed) or a fake file.
Files found in .rar format from third-party sources can sometimes carry risks. Before proceeding: Order.of.War.rar
Always run the file through an antivirus program or upload it to VirusTotal to check for hidden threats. If the file size is significantly smaller than
If you have verified the file is safe, the general process is: the archive to a folder on your drive. 7-Zip (free and open-source)
You will need a tool like WinRAR , 7-Zip (free and open-source), or The Unarchiver (for macOS).