What's there to do when you've finished the main story of Assassin's Creed Odyssey? Lots. Playing at level 49 and 50 (level cap for the main game) with Kassandra we do a couple of minor missions in Sparta, take out a Cultist, and eventually make our way to Lesbos for the Medusa questline that's tied to the First Civilisation mystery. Naturally, there are some spoilers in there, stuff that may give you clues about the main story as well, so if you don't want to spoil things stay away or don't look at those tiny details...