While Factorio never goes on sale, Steam and the official website offer in some countries, making the game more affordable. You can also receive the game as a gift from a friend via Steam.
However, there are two ways to get it "free" or experience it for $0: The Free Demo: There is a Free Factorio Demo factorio linux free download
You can choose from several installation methods depending on your preference: While Factorio never goes on sale, Steam and