Mad Planets is a multidirectional shooter released in arcades in 1983 by Gottlieb. The player controls a spaceship which can be moved and rotated independently to fend off angry planets and moons attacking from all directions. It was designed and programmed by Kan Yabumoto, with art by Jeff Lee and sound by David D. Thiel. Lee and Thiel previously worked on Q*bert for Gottlieb, a game that was inspired by a pattern of hexagons implemented by Yabumoto. Kan Yabumoto died in 2017 of a degenerative lung disease.