Degrees of success in Pathfinder 2e. I know other games have done this before, but it was the first game I read it in where it really stuck because it laid out the exact effects.

Like Mage: the Ascension/Mage: the Awakening!

Vienna was built when a confusing city layout helped defend the city from being taken over.

Black Panthers are also the reason we have school lunches for low income students, from what I had heard. I can't verify that at the moment, though.