Factorio is a paid game developed by Wube Software. This guide assumes you have legitimately purchased the game and are looking to download an older version (0.16.51) via the official Factorio website or Steam. We do not support or provide links to pirated content.
Download the free demo from factorio.com. If you enjoy the core loop, purchase the game once and access every version from 0.12 to the present on all three platforms. No legitimate "free download" of the full 0.16.51 exists. Factorio 0.16.51 - Windows- Linux- Mac Free Download
Log in to your account, go to the "Downloads" section, and select "Archive." You can download the standalone DRM-free installer for 0.16.51 there. Right-click Factorio in your Properties 0.16.x - old-experimental-0.16 from the dropdown menu. Factorio is a paid game developed by Wube Software