The Apple of Eden is the Apple-shaped Isu artifact central to many Assassin's Creed stories.
The Apples of Eden are Pieces of Eden, advanced artifacts created by the Isu, the ancient civilization that existed before humanity's recorded history. They can influence human minds and project visions, making them valuable to both the Assassins and the Templars.
The series often treats “Apple of Eden” as a specific artifact while also describing multiple Apples as part of the broader Pieces of Eden category. Their powers and history connect the modern-day storyline with events in the historical simulations.
Other Eden artifacts have different forms and functions. The Staff of Hermes is another powerful Piece of Eden, the Shrouds are healing-related artifacts, and the Swords of Eden are weapon-like Pieces. They should not be treated as alternate names for the Apple.