Donkey Kong Jr. was originally released in the arcades in 1982 as a sequel to Donkey Kong. In this game, Mario plays the antagonist, finally having captured Donkey Kong, and has put the ape in a locked cage. As Donkey Kong Jr., players will have to make their way through four different levels (Vines, Springboard, Chains and Mario's Hideout) in an attempt to find keys to free the little monkey's father.
Super DK! Junior was an enhanced prototype version of the 1983 Donkey Kong Jr Colecovision release. The unreleased Super DK! Junior version fully utilized the memory of the Colecovision cartridge with additional screens and improved sound effects not included in the 1983 release.