What unusual and non-standard games did you play? What are the online casinos offering something unique and fresh?
(I plan to make a consolidated list with all the suggestions you post in this thread.)
I think random-based betting games shouldn't be too exciting, so people don't getting addicted to them. Unless there are strategies (known by few people) for winning them consistently , they shouldn't be enjoyed too much else those who rely on luck to bet on them would be losing miserably to them if they become addicted.
One of my favorites(I haven't played it though) is "bets on crypto prices". They could be considered skill-based by some and could be fun