Which Assassin's Creed game was the first to introduce the Eagle Bearer Kassandra or Alexios?

Assassin's Creed Odyssey was the first game to introduce the Eagle Bearer Kassandra or Alexios.

Odyssey is set in ancient Greece during the Peloponnesian War, beginning in 431 BCE. Players choose Kassandra or Alexios as the protagonist, and the selected character is known as the Eagle Bearer. The game follows their mercenary career, family history, and encounters with the Cult of Kosmos.

Ubisoft released Odyssey in 2018. It expanded the series' role-playing systems with dialogue choices, branching quests, equipment levels, and multiple story outcomes. The protagonist also uses an eagle, Ikaros, to scout locations and identify enemies.

The phrasing can cause confusion because Kassandra and Alexios are two selectable presentations of the same protagonist role, not separate playable campaigns with entirely different historical identities. The game's setting also predates Origins, which takes place in Ptolemaic Egypt and introduces Bayek as its central character.