: If you want to keep a separate instance of version 1.1 alongside a newer version (like 2.0), you can download the stand-alone zip version from the official website . This version is self-contained and won't interfere with your main Steam or local installation.
: The most reliable way to access specific older versions like 1.1.69 is through the developers' official archive page . download-factorio-v1-1-69-online
To download Factorio version , you should use the official Factorio Download Archive . Official Download Options : If you want to keep a separate instance of version 1