An educational game about the stock market + stock market manipulation. Showing how it works, and why it’s so bad and stupid.
Everyone has investments/companies/whatever. They are responsible for making them worth more/less, but they are ALSO able to tell others to invest or not in advance, giving them an advantage … if they can trust you.
We COULD simplify that further to literally just cards that say “stock goes up by X” or “stock goes down by Y”. Only one player actually gets that card, the others get a fake one, and now you need to act on that information.