Are you sure? I haven't played any of Sony's games on GOG. From reviews, it looks like Horizon still sends telemetry if you're connected to the internet, but I don't believe it's gotten the remaster update that mandates PSN. I could be out of the loop though. I do know that GOG caught flak for allowing Hitman 2016 on the store, which is technically playable from start to finish without an internet connection, but the connection to their server gates all sorts of extras, so the customers rebelled and got it removed.