The 100 coins paradox is my fav. A 2 player game where they each take turn taking 1 coin. But taking 2 ends the game. 🤔
If there are 3 left, the next player should take 2, so the current player should take 2. But then that's also true if there are 4 left, 5 left, etc. The next player should always take 2 & end the game. So greed kills the game (a paradox of greed). 98 coins are returned after the initial player takes 2, leaving them both poor.
I first read this back in undergrad, in 2007. It was in Paradoxes, by R.M. Sainsbury.
https://philosophy.stackexchange.com/questions/1697/100-coins-paradox