The Return of Heracles Picture

There have been many games that feature greek mythology, most notably the God of War franchise. However, has there been RPGs (if any) that truly uses greek mythology at its core? I honestly can't come up with any at the top of my head but I find it astounding that Nintendo would not release this particular RPG franchise overseas way back in the 80's.

The popularity of Dragon Quest and Final Fantasy over here should have been motivation enough to at least attempt to bring the series to the rest of the world but, as usual with japanese developers at the time, they decided that it wasn't worth the effort (at least until they finally brought the next game in the series over here 20 something years later.....