There seems to be some footage of an unannounced mission type called Rift from the upcoming game Assassin's Creed Unity. The player has to roam around the environment trying to grab the required data fragments to try and unlock new missions and items for you to checkout in the database menu.
via N4G: pc news feed http://ift.tt/1vA1Ypt
via N4G: pc news feed http://ift.tt/1vA1Ypt