Pac-Man's creator, Toru Iwatani, allegedly carries his top secret sketches around with him wherever he goes, no doubt believing they're safer strapped to his vest than locked in a vault somewhere. Personally, I believe they belong in a museum.
This is the first time Iwatani has shown the sketches off, while on a bus to the Festival of Games in the Netherlands according to the Dutch site Control-Online. In essence, these pencil sketches on graph paper are one of the first examples of digital art. Or, a prototype of digital art. Something like that, anyway.