Which Assassin's Creed game lets players choose between siblings Alexios and Kassandra?

Assassin's Creed Odyssey lets players choose between the siblings Alexios and Kassandra.

Released in 2018, Odyssey is set in ancient Greece during the Peloponnesian War between Athens and Sparta. At the beginning of the campaign, the player selects either Alexios or Kassandra as the protagonist. The unchosen sibling remains part of the story, so the choice changes the player's central character rather than removing the family relationship.

Both protagonists are described as descendants of King Leonidas I and begin the game as mercenaries. The narrative includes choices, dialogue branches, naval travel, and role-playing systems that give the player more control over some outcomes than earlier entries typically offered.

Odyssey is set before Origins in the series' historical chronology. It does not depict the formal founding of the Hidden Ones; that development belongs to Origins. Instead, Odyssey explores the ancient Greek world and the conflict surrounding the Cult of Kosmos, a secret organization opposed by the protagonist.