Paris is the main open-world setting of Assassin's Creed Unity.
Unity follows Arno Dorian, an Assassin active during the French Revolution. Much of the game takes place in Paris, where players can explore districts, landmarks, crowds, political unrest, and missions connected to both the revolution and the Templar Order.
Versailles also appears in the game, particularly in its opening sequence, which can make it seem like an alternative main setting. However, the central open world is Paris, and the title's missions, investigations, and cooperative activities are primarily built around the capital.
Released in 2014, Unity was designed around dense crowds, detailed buildings, parkour, and cooperative missions for multiple players. Its historical backdrop includes the storming of the Bastille, the Reign of Terror, and major revolutionary figures, though the player character's story is fictionalized within that context.