is one of my favorites for sure.
Very classic storytelling (narration and voice talent is superb). The use of ambiance and music sets this perfect edge-of-your-seat thriller. Definitely worth checking out if this is the type of game you like
Steam has it for $10: http://store.steampowered.com/app/46460/
and 11th Hour
are also great games.. though they're so old, it would be hard to find copies of them (I'd imagine). Might try GOG.