What organization do Bayek and Aya establish near the end of Assassin's Creed Origins?

Bayek and Aya establish the Hidden Ones near the end of Assassin's Creed Origins.

The Hidden Ones are founded in the first century BCE as a secret organization opposing oppressive rulers and protecting ordinary people. Their creation explains how the series' Assassin tradition begins in the ancient world depicted by Origins.

The group's early creed emphasizes acting from the shadows and avoiding harm to innocent people. Its members use a hidden blade and gradually develop practices that resemble the later Assassin Brotherhood.

The Hidden Ones are not exactly the same organization as the later medieval Assassins. The name “Assassins” becomes associated with the group centuries afterward, especially through the historical Nizari Ismaili community. The Templar Order is their recurring ideological enemy, while the Cult of Kosmos belongs to Assassin's Creed Odyssey.