I’ve often thought it would be fun to get a big group of Flat-Earthers involved in a scientific project to ‘prove’ that the Earth is flat. They’re not allowed to rely on any existing science that might be biased towards ‘Big Globe’ so they have to start from scratch using simple instruments. Using existing maps and GPS are definitely out of the question. Have them conduct cartographic surveys and take astronomical measurements so that they can show that reality is inconsistent with a round Earth. Basically, see how long you can keep them going for before their brains break.
I’m almost never willing to pay current AAA game prices for a game that it’s possible I’ll be bored with after a few hours. I’d much rather spend the same amount on 3 or 4 well-reviewed indie games as the chances are I’ll get at least one game amongst them that I’ll enjoy investing my time into.