Twinfinite writes “The history buffs will have noted that Odysseys Spartan Greek setting predates Origins Ptolemaic Egypt by several hundred years. So how does a game set before the origins of the entire Assassins brotherhood make sense in the context of AC lore? We asked that very question to one of Ubisofts narrative leads, and heres what we were told.”
Source: N4G PC We Asked Ubisoft How Odyssey Ties to Assassin's Creed Lore, Here's What they Said