Virtually none of them (Except Alyx I guess) are games that rely on high-end fancy graphics to pull their audience in. Most of them seem to be quirky, niche-y gameplay based games, I haven't even heard of half the games in the top 25. Would be interesting to see how lucrative they were.
Edit : One of the games I did play was Rimworld. That one has apparently sold a million copies, and made over $100 million dollar, and that was 5 years ago. Not sure how accurate those numbers are, but they're probably more reliable to track than those random celeb wealth stats. And since it's an evergreen title that is still receiving patches and paid DLC's those numbers are most likely way higher now.
Star Dew Valley is kind of the Blair Witch Project of gaming, in the sense it was made on a small budget, but turned out a huge profit. 20 million copies sold with a revenue of $300 million dollar. That's crazy!
