I learned how to navigate by compass and map from Arma on the account of you kind of need to, to play certain game modes.
I have never learned shit from "educational" games because they all fail at being games. They're tests with some graphics added, that shit is boring and nobody cares, there's no incentive.
Under FALGSOC, every game would teach you at least one skill
EDIT: I learned Sneaking from Gothic because to sneak in that game you have some guy explaining it to you and that came in very handy as a teenager
I played Oregon Trail, allthough due to it being an internet phenomenon, not like natively. From what I recall, it doesn't actually teach you all that much about the actual oregon trail unless you go read some long ass texts that have no bearing on actual gameplay?
Like I'm sure it teaches you, quite vividly, that movement through the wilderness by wagon trail sucks major ass. It's like the Assassins Creed approach of having a good game and then for the educational part (not that AC doesn't teach you at least a rough idea about some historic events) you can visit the in-game wikipedia as if I couldn't just visit the actual wikipedia