Age of Empires III

Widescreen resolutions are supported out of the box. All you need to do is select one in the graphics options menu. Most of the HUD elements stretch. Though interestingly, the circular mini-map does not.

All of the cut-scenes in this game appear to be rendered in-game. They are pillarboxed, even the "wide" ones. The proportions are correct, but anamorphic cut-scenes (or even Hor+ ones) would have been nice.