The Apple of Eden is the fictional artifact often called an Apple in Assassin's Creed.
It belongs to the series' Isu artifacts, powerful objects created by the technologically advanced civilization that existed before recorded human history. Apples of Eden can influence minds, create illusions, and interact with other advanced systems. Because of these abilities, Assassins and Templars repeatedly seek them across different historical periods.
The artifact appears in several games, including the original Assassin's Creed, Assassin's Creed II, and Assassin's Creed III. Although characters often call it simply “the Apple,” the full name is Apple of Eden. Multiple Apples exist in the fictional universe, so the term describes a class of artifacts rather than one uniquely numbered object.
Other Eden artifacts have different names and functions. The Staff of Hermes and the Spear of Leonidas are especially associated with later games, but neither is the central Apple artifact. The Apple should also not be confused with a real historical relic; it is a fictional element of the series' mythology.