Ubisoft has been giving away one free game per month on PC to anyone with a Ubisoft account. Gamers had 30 or so days to download the game before a new one would take its place, but as its 30 Days ...

TL;DR: Ubisoft has introduced Assassin's Creed Infinity, also known as the Animus Hub, which serves as a centralized launcher for all Assassin's Creed games, similar to the Call of Duty HQ launcher.