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 feel like the more you have to learn something in order to utilize game mechanics, the more likely you are to retain information.
ie survival games with foraging mechanics can instill the basics of foraging, plant species, and how said species need to be processed in order to be edible, because the player is able to mechanically benefit by learning those things
I learnt a lot as a kid from an old point and click horror game called Biosys, about being stranded in a set of biospheres. It had a great in-game encyclopedia about the plants of various biomes, and you needed to use it to safely find food and water, etc.
Also learned about mescaline, white angels trumpet, and mutant maneating plant vampires that keep stealing all your precious CO2 facehugger style...