The pinned review which you're looking at is from 2016, and is mostly nonsense. Factorio requires an account for some online features, including automatic updat

The pinned review which you're looking at is from 2016, and is mostly nonsense. Factorio requires an account for some online features, including automatic updates and access to the mod portal. However, the game itself does not use any form of DRM. You do not need an account or an Internet connection to play the game. Some of the other reviews look like they might be referring to an old business model the game was sold under where there were multiple different "packages" containing different features (e.g. a couple of puzzle scenarios). This model was abandoned in 2016 when the game was released on Steam; all features are now included in all versions of the game.