Which Assassin's Creed game introduced the multiplayer mode centered on stalking targets in crowded cities?

Assassin's Creed Brotherhood introduced the series' multiplayer mode centered on stalking targets in crowded cities.

Brotherhood added a competitive online multiplayer component in which players took the roles of Assassin characters hunting one another. The core mode asked a player to identify and pursue a designated target while also evading another player assigned to pursue them. Disguise, blending, patience, and careful movement were central to the experience.

The multiplayer maps drew on the series' social-stealth environments, including urban locations filled with non-player characters. Rather than functioning as a standard team shooter, the mode rewarded remaining inconspicuous and timing attacks carefully. This made it distinct from the primarily single-player campaigns of earlier entries.

Brotherhood was released in 2010 and continued the story of Ezio Auditore in Renaissance Rome. Its multiplayer was later expanded and refined in subsequent Assassin's Creed titles, including Revelations and Assassin's Creed III. The feature is often confused with cooperative play, but Brotherhood's original mode was primarily competitive player-versus-player stalking.