In the first Assassin's Creed game, what is the name of the playable Assassin Altaïr Ibn-La'Ahad?

The playable Assassin in the first Assassin's Creed game is Altaïr Ibn-La'Ahad.

Altaïr is introduced as a highly skilled Assassin operating in the Holy Land during the Third Crusade. After a failed mission, he is demoted and must recover his rank by carrying out assignments for the Brotherhood. His targets include influential figures in cities such as Jerusalem, Acre, and Damascus.

The game presents Altaïr's story through Desmond Miles, whose genetic memories are accessed with the Animus. This framing device allows the series to connect a medieval adventure with a modern-day science-fiction plot. Altaïr's name is sometimes confused with Ezio Auditore, the Renaissance protagonist of several later games, or Bayek of Siwa, the lead character in Assassin's Creed Origins.

Altaïr also appears in later series lore, including Assassin's Creed Revelations, which explores his life and legacy. His role established many recurring series ideas, including hidden blades, parkour, social stealth, and conflict between Assassins and Templars.