.theprodukkt is a project dedicated to generative computer graphics - procedural generation of textures and models. I recently became aware of their FPS demo .kkrieger, which is an astonishing 96K . For my more technically challenged readers I should point out this is incredibly small, the (already compressed) JPEG thumbnail images below are about 13KB each.
Their latest demo .debris is slightly bigger at 177K (think 14 thumbnails) and is non-playable, but is absolutely spectacular. It marries a fascinating technology with great artistic flair.