Alex Kidd in the Enchanted Castle is a side-scrolling platform game developed and published by Sega for the Sega Mega Drive/Genesis video game console. The game was released in Japan in February 1989, in the United States in January 1990 and in Europe in November 1990. It is the only 16-bit platform game starring Alex Kidd, and the fifth game in the Alex Kidd Series of video games. The storyline is a direct sequel to the events of 1986's Alex Kidd in Miracle World.
Alex Kidd lives on the planet Aries, in the kingdom of Radaxian, ruled by his brother, Igul. After hearing a rumor that his long-lost father, King Thunder (named Thor in this game), is actually alive and well on the planet Paperock, Alex travels to the planet in search of him. Alex as he fights his way through the planet Paperock in search of his long-lost father.
Alex travelled through many areas of the planet before finally defeating Ashra, the King of Paperock before finally reaching King Thunder. The king then revealed to Alex that it was in fact he who was the true king of Paperock and that Ashra was only a puppet. Alex was pleased to learn his father was safe and they wished each other well. Alex returned to Aries and told his family of King Thunder's whereabouts and the two planets were forevermore at peace.
Alex has access to several items and vehicles that help him complete his quest, including a Sukopako Motorcycle, Pedicopter, and pogo stick, which each give him unique abilities. While traveling through eleven worlds, Alex must defeat several opponents in Janken during his search for King Thunder.
The player guides Alex through eleven levels by fighting and avoiding enemies and obstacles. Alex can jump, kick, crawl or punch enemies, causing them to explode into gold coins, called Baums. One hit from any enemy causes Alex to die instantly
- In the original Japanese version of the game, when Alex or his opponent lose a Janken match, their clothes disappear, leaving them naked with a leaf over his/her genitalia. In the Western versions, the loser is flattened by a heavy weight.