[2023] The whole game is fantasy alt-history paradox, embrace it.

This is definitely something best left to the realm of community mods, as Rex said.

However, it's less a question of resources and more a matter of... tonality. We can create a realistic base and allow people to add fantasy elements on top of it if they'd like, but if we create a fantasy base then everyone will have fantasy elements in their game whether they like it or not.