I learned to read and write by playing Sierra games. I played them with my dad. And I guess I wanted to be able to play them alone.
So the crappy text parsing forced me to learn written English. "Get knife" -> "What is a knife?", "Get sword" -> "I don't see a sword", "Get dagger" -> "You have the dagger". Over and over with many different circumstances. So I also learned to type.
I entered pre-school already knowing how to read and write, much to the chagrin of some teachers.
I am not saying this style of gaming was overall good. But it hard a weird unique impact on my development.