Assassin's Creed Odyssey is an action-playing game developed by Ubisoft Quebec Studios and released by Ubisoft. It was released on October 5, 2018 and is available on PC, PS4, and Xbox One platforms. This work is the eleventh work of Assassin's Creed and is also the sequel to the 2017 game "Assassin's Creed: Origin".

The modern plot of the story follows "Assassin's Creed: Origin". In the search for the artifacts of Ishu, Layla Hassan discovered an ancient book called "The Lost History" written by Herodotus, the earliest Greek historian, which mentioned a Spartan mercenary who used Ishu's weapon "The Spear of Leonidas". Leila finds the Spear of Leonidas and pursues this unknown history with the help of Dr. Victoria Biber.

Time goes back to 432 BC. The story unfolds on the small island of Kefalonia. The protagonist is a well-known mercenary on the island. His friend Marcus borrowed a large amount of money from the local snake nicknamed "The One-Eyed Man" in order to build a vineyard. The protagonist helps Marcus pay off his debts, and embarks on the road to collect debts. Therefore, he is involved in the disputes of the Peloponnese War and explores the mystery of his past life experience.