Assassin's Creed Odyssey, where is Messenia?

Arisdomenez Valley in eastern Messenia. According to Assassin's Creed: Odyssey, Messenia is located in Aris Domenez Valley in the east of Messenia. Assassin's Creed: Odyssey is an action game developed by Ubisoft Quebec Studio and released by Ubisoft. It is the eighth main series of Assassin's Creed and the sequel of the game Assassin's Creed: Origin 20 17.