Which company developed the first Assassin's Creed game, released in 2007?

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

The Canadian studio created the original game as a new historical action-adventure series for Ubisoft. Its design combined stealth, sword combat, free-running, investigation, and exploration across reconstructed medieval cities. The game follows Altaïr Ibn-La'Ahad during the Third Crusade, with locations including Masyaf, Jerusalem, Acre, and Damascus.

Ubisoft Montreal is often confused with Ubisoft Quebec, another Ubisoft studio that later led Assassin's Creed games. Quebec developed Assassin's Creed Odyssey and Assassin's Creed Syndicate, while Montreal developed the first game and several later entries.

The original Assassin's Creed launched for PlayStation 3 and Xbox 360 in November 2007, followed by a Windows release in 2008. Its parkour-focused movement and social-stealth systems established the series' core identity.