I was a big SCI0-era Sierra fan, and while I did buy a few of those invisible-ink hint books, their best games overcame most of the frustration factor. I was pa

I was a big SCI0-era Sierra fan, and while I did buy a few of those invisible-ink hint books, their best games overcame most of the frustration factor. I was particularly fond of The Colonel's Bequest, where the clever time mechanic drove the game to its conclusion whether the player had solved every puzzle or not.