Who is the main playable Assassin in the original Assassin's Creed video game?

Altaïr Ibn-La'Ahad is the main playable Assassin in the original Assassin's Creed game.

Altaïr is portrayed as a highly skilled Assassin operating in the Levant during the Third Crusade. At the beginning of the game, his arrogance leads to a demotion within the Brotherhood. He must then complete a series of missions while gradually learning more about discipline, observation, and the consequences of his actions.

The character is often confused with Ezio Auditore, who became the protagonist of Assassin's Creed II and two related games. Altaïr's story continues in Assassin's Creed: Revelations, where he appears at several stages of his life. His name is commonly rendered with a diacritic as Altaïr, while Ibn-La'Ahad means “son of no one” in Arabic transliteration.