Glory of Heracles (ヘラクレスの栄光) is a five-part JRPG series that was developed by Data East until it folded in the early 2000s, then the license was picked up by Nintendo and developed by a second-party developer, Paon (who is composed largely of ex-Data East employees and bought the IP rights.)
-Tōjin Makyō-den Heracles no Eikō (Legend of the Fighting Demon's Lair-Glory of Heracles), 1987 Famicom. Young Heracles goes to Hades.
-Heracles no Eikō II: Titan no Metsubō (Glory of Heracles II: Titan's Downfall) 1989 Famicom. Heracles is a legendary hero now and one of the Titans offspring has declared himself to be the prince of darkness.
-Heracles no Eikō III: Kamigami no Chinmoku (Glory of Heracles III: Silence of the Gods) 1992 Super Famicom. Heracles has lost his strength for defying Zeus.
—Heracles no Eikō: Ugokidashita Kamigami (Glory of Heracles: The Gods Began to Move - The Snap-Story) 1992 Gameboy. Zeus summons Heracles to prevent Cronus’s release.
-Heracles no Eikō IV: Kamigami kara no Okurimono (Glory of Heracles IV: Gift from the Gods) 1994 Super Famicom, you play as a body surfer
-Glory Of Heracles 2008 DS, a group of immortals has lost their memory.The first two games in the series, available on the Famicom are pretty much just straight-up Dragon Quest clones, although the complete and total focus on Greek Mythology (right down to using the proper Greek name of Greek mythology's legendary hero) was and is unique for the genre. The latest title, recently released for the Nintendo DS, includes light strategy elements, making the game feel similar to Golden Sun.
Tropes that the series utilizes: