Which Assassin's Creed game introduced the series' multiplayer mode with Templar agents hunting targets in cities?

Assassin's Creed: Brotherhood introduced the series' competitive multiplayer mode with Templar agents hunting targets in cities.

Brotherhood's multiplayer launched alongside the single-player game in 2010. Players took the roles of Templar-aligned characters and pursued assigned targets while trying to remain unidentified and evade their own pursuers. The design emphasized blending into crowds, recognizing behavior, and timing attacks rather than simply defeating every opponent.

The single-player story continues Ezio Auditore's campaign in Rome, where he rebuilds the Assassin Brotherhood and confronts the Borgia family. Multiplayer was a separate competitive experience, although it used the same series mythology and visual language.

Assassin's Creed II, Revelations, and Assassin's Creed III contain major single-player features but did not introduce this first competitive multiplayer format. Later entries expanded the multiplayer roster and modes, but Brotherhood is the series debut commonly credited for it.