Three main games make up the Ezio trilogy in Assassin’s Creed.
Ezio Auditore da Firenze is the central character of Assassin’s Creed II, Assassin’s Creed: Brotherhood, and Assassin’s Creed: Revelations. Together, these games follow his transformation from a young Florentine nobleman into a veteran Assassin.
The trilogy spans several decades and locations, including Renaissance Italy, Rome, Constantinople, and Masyaf. The games were released in 2009, 2010, and 2011 respectively, creating one continuous character arc across three major titles.
Some collections include extra short films, downloadable content, or multiplayer material, which can make the total associated with Ezio seem larger. Those additions do not change the standard meaning of the Ezio trilogy: it refers to the three principal games starring him.