Which studio developed the original Assassin's Creed game released in 2007?

Ubisoft Montreal developed the original Assassin's Creed game released in 2007.

The Canadian studio created the first entry in Ubisoft's historical action-adventure series. The game follows Altaïr Ibn-La'Ahad during the Third Crusade and established the series' signature combination of stealth, parkour, open-world exploration, and historical figures.

Ubisoft Montreal remained closely associated with the franchise after the original game. It also led development on Assassin's Creed II, Assassin's Creed Brotherhood, Assassin's Creed Revelations, and Assassin's Creed III, although later entries were produced by several Ubisoft studios working together.

A common mix-up is confusing the original developer with Ubisoft Quebec, which led Assassin's Creed Odyssey, or Ubisoft Sofia, which developed Assassin's Creed Rogue. The publisher was Ubisoft, while Ubisoft Montreal was the specific studio responsible for the original game's development.