Which Assassin's Creed game introduced the multiplayer mode featuring Templar agents and Abstergo employees?

Assassin's Creed: Brotherhood introduced the series' competitive multiplayer mode featuring Templar agents and Abstergo employees.

Released in 2010, Brotherhood added online multiplayer alongside its single-player campaign. In the mode, players use Abstergo's Animus technology to enter simulated historical environments, select specialized characters, and hunt assigned targets while trying to avoid being detected themselves.

The multiplayer fiction presents participants as modern-day Abstergo employees training through historical simulations. This perspective differs from the single-player story, where Desmond Miles experiences memories connected to Assassin ancestors. Multiplayer sessions emphasized stealth, disguise, blending, and timing rather than straightforward combat.

Assassin's Creed II did not include this competitive online mode, and later games changed or expanded the multiplayer systems. Brotherhood's multiplayer servers were eventually shut down, but the feature remains an important series milestone because it made social stealth competitive between players.