"Chou Saiya Densetsu" is based on the popular manga/anime series Dragon Ball. It follows the events described in the beginning of Dragon Ball Z, the second story block, which tells about the connection of the hero Son Gokuu with a powerful alien race, and new mighty foes from far away planets. The game starts just where the tale of Dragon Ball begins. Son Gokuu goes to meet his friends but is stopped by a mysterious stranger named Raditz who tells Son Gokuu that they are relatives. Raditz demands him to destroy humanity, and because Son Gokuu refuses, he takes his son Son Gohan hostage. To rescue his son, Son Gokuu joins forces with his arch-rival, the Demon King Piccolo, who obviously has his own plans concerning Raditz. And thus begins the story during which Son Gokuu will learn of his true origin.
"Chou Saiya Densetsu" is a RPG similar to the card-based Dragon Ball Z RPG's for NES. During battles, you choose cards from your card inventory, which determine the nature and the strength of your characters' attacks. You can also train your characters in training houses and upgrade their special Ki power. Unlike early DBZ RPGs, you can move around freely in "Chou Saiya Densetsu", and your movements are not determined by cards. You can also fly around the world and use your special Dragon Radar to discover the location of magical Dragon Balls.