To start the Holiday Season, Ubisoft is happy to offer you Watch_Dogs for free on PC. Stay tuned for more surprises! Available from November 7th to November 13th on Uplay PC
https://freetrial.ubisoft.com/promotions/watch-dogs-1/8/
or load UPlay and click the banner. It says starting the 7th, but you can click now and it will "preload" it, and add it to your library.