There’s nothing that says game developers can’t allow add-ons to be installed from third party stores. Already works that way with games like Gratuitous Space Battles. I’ve bought the expansions on third party stores and simply put the zips or whatever in the relevant game folder.
I don’t know if something has changed since that game, but I don’t see addons sold by 3rd parties as a popular avenue for consumers simply because you have to then manually manage it.
Goodeye8@piefed.social 1 week ago
We don’t really know what the add-on argument is because the article doesn’t really say much about it. I didn’t mean Steam prohibits modifying game files, which is pretty much what you did to add the expansions. I meant it more like you describe in the last paragraph where your purchases are platform agnostic, you buy where you want to and you play where you want to.