I am in the middle of shopping out yet another game, a White Water. With the possible exception of my Star Trek TNG I cannot imagine a more difficult game to shop. Between the multiple ramps (7), fragile mountains, mini playfield, and optos it has been a royal pain.
What game do you feel is the most difficult to shop. I have put in a few based of personal experience and guesses from looking at machines.
I will add names to the poll as suggested.