8. The Stanley Parable
I personally did not enjoy this game that much, but it was more of preference than general quality. Is this a game? I don't know really since Stanley Parable isn't about launching birds in the air or shooting aliens. It's a game filled with choice and it makes you wonder if you are deciding on your own or if you are being led to a particular decision. It's more of a thinking man's game with twists and witty dialogue.
I might not have loved it as much, but it is definitely an intelligent game that will delight gamers.