Which Assassin's Creed game is set primarily in the Viking Age?

Assassin's Creed Valhalla is the series game set primarily in the Viking Age. The player controls Eivor, a Viking raider who leaves Norway and establishes a settlement in ninth-century England.

The game is set during the expansion of the Great Heathen Army and the conflicts involving Anglo-Saxon kingdoms. Its world includes Norway, England, and additional regions visited during the story. Eivor can be presented as male or female, while the character's canon name is Eivor Varinsdottir.

Valhalla is not the only Assassin's Creed title to use a historical setting involving Norse culture. Mirage includes a later medieval Middle Eastern setting, and Origins centers on ancient Egypt. Valhalla is the entry specifically built around Viking-era England and Norway.