Which Assassin's Creed game was the first to use the title 'Origins'?

Assassin's Creed Origins is the Assassin's Creed game that uses the title “Origins.”

Released in 2017, Origins tells the story of Bayek of Siwa and Aya during the Ptolemaic period of ancient Egypt. Its title reflects the game's focus on the early formation of the Hidden Ones, the organization that later develops into the Assassin Brotherhood known from other entries.

Origins also marked a major design shift for the series. It introduced deeper role-playing systems, experience levels, loot, extensive ability trees, and a large open world built around ancient Egyptian regions and settlements. These features influenced Odyssey and Valhalla.

The title is sometimes described as the origin of the Assassins, but the game does not portray the fully developed Brotherhood in the same form seen in later historical periods. Instead, it dramatizes the movement's foundation and the personal events that lead Bayek and Aya to create it.