Dragon Knight III is an eroge role-playing video game released on many Japanese PCs in 1991. It is part of the Dragon Knight series of games created by Japanese game developer ELF, who originally released the game for the NEC PC-9801 computer in 1991, followed by ports for the Sharp X68000 and PC Engine CD platforms.

The game is a sequel of Dragon Knight and Dragon Knight II. Its gameplay system is different from that of previous installments of the Dragon Knight series, resembling this of the early Final Fantasy (even more in the PC version) series instead of first-person-view dungeon crawler, and enabling the player to explore the entire world of the game. Some of the characters were renamed in the English and German localized Knights of Xentar release, including the protagonist Takeru's name changed to Desmond.

After liberating the city of Phoenix from an evil curse in his previous adventure, Takeru finds himself in a situation unworthy of his heroic status: robbers have taken all his possessions, including his magic sword, and even his clothes! So the first task for the unsuccessful hero is to get some money. Luckily, the mayor has an assignment for him, for which he is also willing to pay. Takeru accepts the assignment without knowing what it will lead to - traveling all over the world, fighting fearsome enemies, encountering beautiful women, and solving a mystery that will also reveal the secret of his own true identity!