The Octology also includes the albums Platneteri, Pixeljams Vol. 1 and the Potatoman soundtrack. Potatoman Seeks the Troof is a platformer that tells the tale of a spud as he leaves the farm and seeks the meaning of life. No, it doesn't make much more sense once you play it, but it sure does make for a wonderful live-action trailer.
Potatoman is also on Steam Greenlight, if that's more your style. You fashionista.