What is the worst way a game expectations betrayed you?
When I played Fallaut new vegas for the first time, as anyone else, I saw the Tower in the distance. So, I walked there in a straight line. I died a few times, but I did get there after a few minutes, only to see, that the Strip was only 3 streets wide. And that was SUCH A HUGE DISAPPOINTMENT, that I did quit the game right there.
Obviously, I did return to the game later, but who thought, that it was a good idea to broadcast the Strip so wide, while also making it accessable through a LOOOONG walking through the most boring area of the game?