https://www.pcgamer.com/assassins-creed-odyssey-isnt-shackled-to-history/

Assassin’s Creed has always had an unusual relationship with history. It’s integral to the series and every game has been rich in historical detail, whether it’s the little facts about landmarks or characters, or the famous faces that you’ll meet as an assassin. It's never been accurate, but it usually feels authentic. But the more the series has progressed, the more it’s started to feel like the Disneyland of history, throwing in celebrities with wild abandon, turning its cities into places where every historical figure of the age seems to reside. 

With Odyssey, Ubisoft is taking a different approach.