Assassin’s Creed Odyssey is an open-world action RPG set in ancient Greece, and it is included with Game Pass Ultimate on Xbox. Release details, platforms and Game Pass status are also on our Assassin’s Creed Odyssey game hub.
Assassin’s Creed Odyssey at a glance
- Released: 5 October 2018
- Developer: Ubisoft Quebec
- Xbox version: Xbox One (Smart Delivery / Series X|S)
- Game Pass: Yes, Game Pass Ultimate (via Ubisoft+ Classics)
- Xbox Cloud Gaming: Yes, with Game Pass Ultimate
- Achievements: 93 (1,850G), difficulty 3/10, 75 to 90 hours
What is Assassin’s Creed Odyssey?
Set during the Peloponnesian War between Athens and Sparta, from 431 to 422 BCE, it lets you choose to play as Alexios or Kassandra, a Spartan mercenary with a mysterious bloodline who fights on both sides of the conflict while searching for their family and taking on the mysterious Cult of Kosmos. Layla Hassan’s modern-day story continues from Origins.
The world spans the Greek mainland and dozens of islands, explored on foot, on horseback or aboard your own ship in naval battles. Combat, stealth and abilities can be built around your preferred play style, dialogue choices shape the story, and there are multiple endings. Developed by Ubisoft Quebec, it was released on Xbox One, PlayStation 4 and PC on 5 October 2018.
How to play Assassin’s Creed Odyssey on Xbox today
Assassin’s Creed Odyssey has native versions for Xbox Series X|S and Xbox One, with Smart Delivery. It is included with Game Pass Ultimate through Ubisoft+ Classics, which has been part of Ultimate since October 2025. Microsoft’s UK catalogue lists it for Xbox console and Xbox Cloud Gaming, so Ultimate members can also stream it. Catalogues change, so check the Xbox app before you subscribe. See our guide to every Assassin’s Creed game on Xbox and Game Pass for the full list.
Editions and remasters
There is no remaster. The Xbox One version plays on Xbox Series X|S.
DLC and expansions
Odyssey has two paid story expansions, Legacy of the First Blade and The Fate of Atlantis, each released in three episodes. Free updates also added The Lost Tales of Greece quests and Mythical Creatures content.
Assassin’s Creed Odyssey achievements
On Xbox, Assassin’s Creed Odyssey has 93 achievements worth 1,850 Gamerscore: 50 (1,000G) in the base game and 43 (850G) from DLC and updates. By our average across several achievement and trophy guides, it rates 3/10 for difficulty, and a completion takes roughly 75 to 90 hours, mostly for the base game.
Aphrodite’s Embrace needs romance choices during the story. In The Fate of Atlantis, The Conqueror needs freed humans from all three regions when you win Elysium’s conquest.
Where it sits in the series
Odyssey follows Origins and is followed by Valhalla, the three games that make up the series’ role-playing era. Compared with other entries, it focuses more on myth and less on the Assassin and Templar conflict. By the release dates on our game hubs, it came after Assassin’s Creed Rogue Remastered (20 March 2018) and before Assassin’s Creed Rebellion (21 November 2018).
Quick answers
Is Assassin’s Creed Odyssey on Game Pass? Yes. Assassin’s Creed Odyssey is in Game Pass Ultimate through Ubisoft+ Classics, on console and in the cloud.
Can I play Assassin’s Creed Odyssey on Xbox Series X|S? Yes, through backward compatibility.
How many achievements does Assassin’s Creed Odyssey have? 93 achievements worth 1,850 Gamerscore on Xbox.
