Syberia and Black Mirror:
Syberia because of the beautiful enviroments (yeah, I know it counts as graphics) and the perfect flow of the game, plus the superb atmosphere.
Black Mirror because it has one of the best and most exciting stories ever written in any game, and the atmpshphere is excellent. It has the same atmosphere as Broken Sword - The Shadow of the Templars, my favorite game of all time. I thought it was impossible for another game to even touch the atmosphere of Broken Sword 1, but Black Mirror did, and how it did