While I did enjoy this classic adventure, along with many of it's genre, I always found it interesting that after Wolfenstien 3D came out many "re-imaginings" of games were created in a simular manner.
http://en.wikipedia.org/wiki/Nitemare_3D
While is was for the most part a FPS, there were a few good riddles and puzzles you needed to solve so you could continue in the game.
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