Heroes of Olympus (1981)

From the back of the box:

Now you can relive and recreate the adventures of the Argonauts!

Heroes of Olympus is a heroic fantasy role-playing game for multiple players and a gamemaster. It can also be played as a conventional two player combat game or even solitaire mode.

Heroes of Olympus includes: Full colour campaign map, four scanrio maps, more than 200 playing pieces. Scenarios include The Challange of Amycus, King Phineus and the Harpies, The Clashing Rocks, The Golden Fleece and more! The game system covers Gods, Humans, Parentage, Melee and Noble Combat, Trickery, Navigation and Naval Combat, Campaign rules and much more.