In lieu of a game review, I want to mention a little toy I made the other day. Back in the days of Infocom, you could get hints for the games in the form of "InvisiClues", which were hints written in invisible ink you could reveal with a special marker. This was handy, since it meant you wouldn't see hints for puzzles you still wanted to solve on your own. The hints were broken up into a series of several individual clues, so you could reveal only the first if you just needed a little help, or reveal them all to see the exact solution to a puzzle.
The days of Infocom games and InvisiClues are behind us, but the format was popular enough that people wrote hints for later games in the same style. The Universal Hint System is a commercial product that provides clues in this style for a large number of games, including quite a variety: there are hints for adventure games like Zork, of course, but also games of other genres, such as Civilization, Super Mario 64, and Dragon Age II.