Journey through the planet Aries to the beautiful City of Radactian - and save it from the evil Janken the Great. This game was considered to be Sega's attempt on Super Mario. Alex Kidd in Miracle World is a video game released in 1986 by Sega for the Sega Master System console. It is the first of several games in the Alex Kidd series, starring a character which would serve as the company's mascot for half a decade before being replaced by Sonic the Hedgehog.