A for Adventure - Review
- Reviewed by GraveDigger on 5th May 2003. "While the game has a few glitches that include a weak storyline, illogical and simple puzzles, inferior quality of music and quite few sound effects, the cut-scenes are well done."
- http://www.a-for-adventure.com/gamereview.php?id=201

Quandary Review
- "This one is a worthwhile diversion for those of you who appreciate the solitary exploration of Myst-style games, and specifically for Science Fiction fans who appreciate futuristic technology." By Rosemary Young.
- http://www.quandaryland.com/jsp/dispArticle.jsp?index=277

David Tanguay's Review
- Rated -4 on -5 to +5 scale. "Except for the finale, the challenges are too easy to make for much of a game, and the story is too small to distract from the lack of challenge."
- http://www.sentex.net/~datanguayh/games/crystalkey_rev.html

UHS: The Crystal Key Hints
- See only the hints you want to see, so you can finish the game on your own.
- http://www.uhs-hints.com/uhsweb/crystkey.php