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In the pre-internet era, any quest was essentially a game with sadistic game design.
I had several games about the Pink Panther, and I couldn't finish any of them. You could complete 3 locations, 5, or however many there were, but sooner or later, you would always reach a point where you couldn't progress: you had pixel-hunted everything, and the author's ingenious idea couldn't be deconstructed any further.
A similar thing happened with Bremen Town Musicians.
The first quest in my life that I managed to complete was Deponia, because by that time, it was already possible to access the guide online. And that's when I was finally able to appreciate the genre.