Coming to PC later this year via Adult Swim games, Kingsway is a role-playing adventure that takes the form of the Kingsway Operating System, which is basically a primitive Windows/MacOS for the monster-slaying set. Travel the King's land via World Navigator window, slaying monsters as they pop up on your desktop. Drag-and-drop windows to your heart's content.
Incredibly creative, and I can't wait to play this when it comes out. And honestly - the 'operating system' looks better than most of the actual operating systems we have today.