[Acebot44]

I think Fable deserves to be on this list because it, more than any other game I can recall, pushed through the idea of having complete control of your character and allowing his actions to significantly alter even the smallest aspects of the game world. Now of course Molyneux and the Carter Brothers didnt accomplish this feat, but they made a few steps toward it.
I HOPE Fable helped usher in a new breed of games....or at least made developers consider adding in a bit of cause-and-effect in their titles.