Earlier quoted context omitted.
I've signed one once that had a clause where everything I made for a year after the job ended I had to approach them with it and give them a chance to offer me money for it (right of first refusal), but never anything where they automatically own it post employment. They did have a 'we own pretty much every thought you have while you work here' clause, though, because it was a game studio and the owner's reasoning wa…
I never believe excuses like that. They can just as easily write "we own any game ideas you come up with while you work here" instead of "every thought". There's no reason to ask for what you don't need and never intend to enforce. Unless you intend to selectively enforce it, in which case I'll assume you'll select me to do so one day.
Considering everything I work on personally was somehow web or media related, it felt very draconian to me at the time. But I still worked there and don't regret my time there overall.