Quote Originally Posted by Midareyukki View Post
TLDR once you buy it through Steam, your account is locked to the Steam version. Meaning you can't get the game off of Square Enix directly nor can't you get the game for any other console, only play it through Steam and Steam alone.
Just to correct the above. You can only own one of either Windows OR Steam, you can then add the Playstation version on top of that, regardless of what you pick. So, Windows/PS is fine, Steam/PS is fine.