The Doomsday Project is a gigantic, factory-like tower that is the mad Dr. Robotnik's creation and it served as the power-hungry genius' ultimate plan to complete his scheme of transforming Mobius into a lifeless wasteland, and it is featured in the titular final episode "The Doomsday Project" of the second season of the cartoon series Sonic the Hedgehog (also known as Sonic SatAM).