Quote Originally Posted by Gnostic Yevon
And don't make the puzzle depend on me knowing something that isn't common knowledge or that I'd have no way to find out by that point in the game.
You're making me think of exactly one puzzle where that is so true.

Fatal Frame/Zero, First Night door number puzzles.

You have to know, and it is hinted at nowhere in the game, that the Japanese numbering on these circular locks begins at zero and goes ANTI-clockwise. This is despite the single document that refers to it is one that likens it to a clock which, as we should all be used to, goes clockwise.

Of course, it was a great game aside from that, but one or two frustrating puzzles like that can entirely throw what would otherwise be a great game.