Hijack the reward mechanism. Fake achievement.
Discussion
Video games are a weirdly sacred cow. People don't want to admit that marinating your brain in an engineered fictional world is somehow bad for you
There was a time when I laughed at old people for saying this, but now I agree as an old fart myself. Especially so for games with killing and normalizing violence.
There's a good chance, if it wasn't for RPG video games - with alternative monetary systems, I would not been open to the idea of Bitcoin. (I'm almost certain of it)
Single player campaigns are no different than books. I stopped online gaming 20 years ago as I found it was largely mind rot (unreal tournament 2004)