Flying Dragon, known in Japan as Hiryū no Ken Twin (飛龍の拳ツイン, Hiryū no Ken Tsuin?, "Twin Fists of the Flying Dragon"), is a fighting game with role-playing video game elements that was developed by Culture Brain and released for the Nintendo 64 in 1998. It was published in Japan by Culture Brain, and by Natsume in North America and Europe. Its most notable feature was the game's SD mode that featured a character progression system, in which characters advance in levels as they become more experienced, and in which it is possible to collect credits and treasure items to equip characters with. The game received relatively low scores on specialized reviews at the time of its release. It had a sequel a year later, titled S.D. Hiryu no Ken Densetsu. Flying Dragon was also an NES game released by Culture Brain in 1989, where the player controlled a martial artist trying to recover magical scrolls stolen by the evil Tusk Soldiers. It was afforded a nominal sequel with Flying Warriors.

Flying Warriors is a 1991 action/fighting video game developed by Culture Brain and published by Culture Brain USA exclusively for the NES in North America in February 1991. It is a mixture of two Family Computer video games in the Hiryū no Ken franchise: Hiryu no Ken II: Dragon no Tsubasa and Hiryu no Ken III: 5 Nin no Ryuu Senshi. It implements ideas and elements from both games, thus making it hard to tell which of the two is officially its Japanese version. 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.