Many of the early console and PC games were only solvable by finding answers in published magazines. Nintendo was notorious for this - they had their own magazine called Nintendo POWER and a hotline you could call to get tips. A few that come to mind:
Blaster Master / Goonies 2 / Mad Max / The Kings Quest games / The Black Caludron
Apologies, I can see how I was confusing. I was listing both Nintendo and PC games that came to mind; Kings Quest and Black Cauldron were PC