Which Assassin's Creed game introduced the Italian Assassin Ezio Auditore?

Assassin's Creed II introduced the Italian Assassin Ezio Auditore.

Released in 2009, Assassin's Creed II follows Ezio from his youth in Florence through his transformation into an Assassin. The game is set during the Italian Renaissance and visits cities and regions including Florence, Venice, Tuscany, and Forlì.

Ezio's family is drawn into a political and Templar-linked conspiracy, motivating his search for justice and knowledge. Historical figures such as Leonardo da Vinci, Lorenzo de' Medici, and Niccolò Machiavelli appear in the story.

Brotherhood and Revelations continue Ezio's life but do not introduce him. Brotherhood focuses heavily on Rome, while Revelations brings together Ezio's later story with Altaïr's legacy in Constantinople.