The Stable release is the standard full-feature Factorio release.
This is the most recent stable release, which means it has been thoroughly bug tested by our community over several months. It should be free from bugs and corruptions.
If you are running a server, you can use this link to always download the latest stable version.
You may download the headless version intended for use on servers.
This is a free publicly accessible demo. It contains only a subset of what is available in the full game.
The purpose of the demo is to teach the very basic game mechanics and let the player decide whether they are interested in more.