The first installment of the Hiryū no Ken series had already been released in North America as Flying Dragon: The Secret Scroll, with virtually no modification aside from the language.

The game features combat in a variety of formats, such as kicking and using fireballs to repel monsters in scrolling stages, a system during one-on-one duels against Tusk Soldiers or a pair of martial arts tournaments where the player must attack a mark that appears on their opponent's body, or defend the area when it appears on them (this system is similar to Culture Brain's original Flying Dragon for the NES), and RPG-style command battles against monster bosses.

While sparring with Rick, Rakan teaches him how to awaken his true power and transform into a Flying Warrior capable of utilizing sacred mirrors to block mystic spells and arcane swords to cast them.

The line to GTG's biological weapon research laboratory in Peru was disconnected when the office was covered with a mysterious black fog, which Rakan believes must have something to do with the Dark Dimension.

Wandering around in Hong Kong, Rick learns that there is a phantom blocking the entrance to the coliseum who can only be banished with the help of a bracelet that can be bought at Shunran's store for coin that can be obtained by fighting Jiangshi and fire-raining ghouls.

Rick ventures beyond the waterfall in search of the stone dragon, and finds it in a cave inhabited by a gargoyle who is really a Tusk Soldier in disguise guarding the Sword of Kirik.

Rick goes back and ventures through another cave guarded by a gargoyle who turns is really a Tusk Soldier in disguise and finds and defeats the phantom, gets the Orb, and enters the tournament.

He fights Litron the martial artist, Thornram the kickboxer, Shiro the karate fighter, The Mad Ape the wrestler, and Slugger Sam the boxer.

Pepe, who lives in a hut, tells them that they need to find a stone tablet in the ruins and place it in the statue of Narga so that the entrance to the laboratory can open behind the waterfall.

The party finds the stone tablet deep within the ruins and brings it to the statue of Narga upstairs, which slides over, revealing the Mirror of Venus.