This is a random post, but I feel compelled to post it, because I find it cool. I stumbled upon a .pdf of behind-the-scenes Grim Fandango documents, including original concept art, puzzle structures (including some that were not included in the game) and snarky comments by Tim Schafer.
What is Grim Fandango, you ask? Only the greatest adventure game ever! If you haven't played this epic tale of crime and corruption in the Land of the Dead, you ought to, right away. Beautiful art, an engrossing story, and characters you can't get out of your head. Probably my favorite game of all time.