Game story · The Assassin's Creed timeline

Assassin's Creed Odyssey

Kassandra searches for her fractured Spartan family while dismantling the Cult of Kosmos during the war between Athens and Sparta.

2018431–422 BCE · Peloponnesian WarCanon status: Variable endings

What happens in the game

The Cult manipulates both sides and treats Kassandra's bloodline as access to Isu power. Family choices determine who can be reconciled at the end.

The modern story follows Layla to Atlantis, where knowledge preserved by Kassandra becomes part of the ongoing struggle over Isu technology.

A family scattered
Kassandra's mercenary journey begins with the mystery of a Spartan family broken by prophecy and political pressure. Nikolaos, Myrrine, Deimos and the protagonist's choices make reunion or further tragedy possible.
The Cult of Kosmos
The Cult manipulates Athens and Sparta while exploiting war to preserve influence. Hunting its branches reveals that neither city-state owns the conflict's moral center and that family blood is being pursued for its Isu connection.
Atlantis and the long watch
Beyond the variable family ending, Kassandra confronts mythical beings linked to Isu artifacts and receives the Staff of Hermes. She survives for millennia to pass it to Layla, binding the ancient odyssey to the modern search.

Kinship creates obligations but not guaranteed reconciliation. Mercy, dialogue and violence accumulate into different households.

The Cult thrives across official sides, treating patriotic division as a resource rather than a cause.

The Cult is dismantled, but Kassandra's family outcome varies; she takes responsibility for guarding the Staff of Hermes across centuries.

The conflict predates the formal Hidden Ones but establishes older resistance to organized control.
Kassandra directly connects the ancient world to Layla's present.

Origins occurs centuries later and turns resistance into the organized Hidden Ones.