I played the Sanitarium demo when it first came out, but never got my hand on the actual game. I was so intrigued by the demo, that I regretted that decision. Well now, thanks to GOG I finally had a chance to play the full game, and it was well worth the wait.
Sanitarium follows an amnesiac mental patient who wakes up in an asylum after an explosion. Throughout the game, the character seemingly gets transported into various dimensions based on his own twisted psyche. The game often leaves you to wonder what is real and what isn't, as the game slowly reveals who your character is and what he's doing there.
The graphics are nice, especially in the bizarre dimensions your character visits. Voice acting is done tolerably well and there's a good learning curve on the puzzles. The ambient sound and score are all excellent, and the game even manages to get in a few touches of off beat humor, with several prominent red herrings throughout. By the end of the game, the puzzles get challenging without ever requiring the kind of moon logic leaps that often accompany these kinds of games. All in all this is a great example of the classic adventure game format.