If I'm not mistaken, Assassin's Creed is moving to that same system as CoD. The AC Infinity thing was supposed to be a single AC app from which you access all future AC games. I would assume that means that AC achievements starting with Shadows will be tracked as part of the AC Infinity app, with each new game adding new achievements to earn on that app.
Edit: Apparently Ubisoft renamed AC Infinity to Animus Hub.
https://assassinscreed.fandom.com/wiki/Animus_Hub









