Altaïr is the first name of the Assassin protagonist in the original Assassin's Creed. Altaïr Ibn-La'Ahad serves as a senior Assassin based at Masyaf, the order's mountain stronghold, during the game's 1191 storyline.
After Altaïr breaks the order's principles during an attempted attack, his mentor Al Mualim removes his rank and equipment. Altaïr must then complete a series of investigations and assassinations across the Holy Land before gradually recovering his status and uncovering a larger conspiracy.
Altaïr is distinct from later playable Assassins such as Ezio Auditore, Connor Kenway, and Arno Dorian. The character also appears in later series material, including Assassin's Creed: Revelations, which explores his later life and connects his story with Ezio's.