Yeah, Paradox Interactive makes a lot of games, mainly Grand Strategy Games that attempt to simulate (alt) history. Crusader Kings is medieval, Hearts of Iron is WW2, etc. It’s a bit like Civilization on steroids with a daunting learning curve.

Paradox games do this too

I don’t know anything about Flightgear but I’ve had a great experience with Bazzite and would recommend it for gaming

Maybe you’re missing the extreme prejudice/racism

Lots of subjects are taught well in video games, intentionally or not