The powerful First Civilization artifact repeatedly featured in Assassin's Creed is the Apple of Eden.
In the series' mythology, Apples of Eden are Pieces of Eden created by the Isu, an advanced civilization that existed before humanity's recorded history. The objects can influence human perception and behavior, making them valuable to both the Assassins and the Templars.
The first game prominently features an Apple held by Robert de Sablé and later used by Altaïr. Subsequent games reveal that multiple Apples exist, so the term does not always identify one single physical object. Their powers and appearance can vary across stories.
The Apple is often confused with other Pieces of Eden, including the Sword of Eden and the Staff of Eden. These artifacts belong to the same fictional category but are distinct objects. Their recurring role links historical conflicts to the franchise's science-fiction mythology.