Watch Dogs is now free on uPlay. This is not a free weekend kind of deal. Just claim the game now and you get to keep it forever. No catch.
You just need to download and install uPlay and claim the game from the store. But if you hate uPlay with a passion, you can buy the game on Steam at full price.
Without a doubt, Watch Dogs is a good game but it’s rating suffers on Steam where review bombing has become rampant. Notably, Ubisoft does not have the best reputation as a games publisher and is usually likened to or said to be much worse than EA.
Note that some users are having some problems adding the game to their account. Ubisoft says the issue has been fixed however. If you can’t get the game today, there is no need to worry since you can still grab it until November 13.