It corresponds to the Altair armor, which has been added to the game to celebrate its success.
You will be able to find this costume in the Animus store and players can claim it for free. With the costume you will also receive the rewards of the Christmas Festival, 300 opals and the costume.
After you get Altair's armor, you can access his appearance to place on your character. But you must have the game updated in the latest version.
PlayStation 4 PS4, PlayStation 5 PS5, Xbox One, Xbox series x, Xbox One, Microsoft Windows PC