Earlier quoted context omitted.
Requirement was always there, just not enforced due to „technical issues”. https://web.archive.org/web/20231207163847/https://store.ste... > „Requires 3rd-Party Account: PlayStation Network” However, making it purchasable from countries not supported by PSN accounts was big error on their part.
IANAL, but couldn't non enforcement create an implied-in-fact contract?
It seems pretty clear that Sony always intended to require a PSN account (although that wasn't always communicated well, it was stated on the Steam store page, at the end of news articles, and in the game itself) so there was no meeting of minds. Just confusion.