The artifact held by Altaïr in Assassin’s Creed: Bloodlines is an Apple of Eden.
Assassin’s Creed: Bloodlines is a 2009 action-adventure game for the PlayStation Portable. It continues Altaïr Ibn-La’Ahad’s story after the events of the first Assassin’s Creed and follows his pursuit of surviving Templar forces in Cyprus.
The Apple of Eden is one of the franchise’s Pieces of Eden, technologically advanced artifacts created by the First Civilization. In the series’ fiction, these objects can influence human perception and behavior, making them central to the long-running struggle between the Assassins and Templars.
The series contains several Pieces of Eden, so players may confuse the Apple with the Staff of Hermes, the Shroud of Eden, or other artifacts. The specific item associated with Altaïr’s Bloodlines storyline is the Apple of Eden.