2 ms·

Can't you run old versions by setting the version in the game properties?

• ndriscoll 11mo ago
  Not that I see. The publisher can add old versions as a "beta" that you can select if they want (e.g. Kerbal Space Program and Factorio do this), but otherwise you can only run the latest. Your choices for updating are "when launching", "when Steam decides", and "immediately". There is no "when I decide" or "never". e.g. Bethesda has apparently broken Fallout 4 multiple times over the last 1.5 years with no ability to revert after it had been stable for 5 years.