From what I can tell some of these comics were the only way to learn how to beat some games. How else would you know to kneel down forever near a lake to get to that third mansion in Castelvania II, or that you need to lift weights to get strong enough to rip a bush out in Maniac Mansion?
That’s a huge difference between games today and games 20 years ago. It would take me hours to figure this kind of stuff out as a kid. Today I’d go on Gamefaqs or just give up.