It's more interesting to talk about unusual candidates than to just make this thread a list of the same obvious choices. Games that are unanimously bad shouldn't even be considered topics for discussion, you boring grass-fed sow.

And to use Yahtzee's Matrix, going into a game expecting it to be great and finding out it's a steaming sack of trout is a far worse feeling than going into a trout game expecting it to be trout and having it be exactly the trout you were expecting.