If you want to try out Watch Dogs 2, now is the best time to get it. Ubisoft is offering the open-world hacking simulator for free. All you need to do is log into your Uplay account. Head to this page and sign in from there. A prompt should show up when you've logged in successfully saying you've claimed the game, and it'll soon appear in your Uplay library.
Watch Dogs 2 was supposed to be a freebie for viewers who tuned into the Ubisoft Forward digital event on Sunday while being logged in to Uplay. But technical problems prevented some people from getting the game. And so the developer decided to give it away. Ubisoft hasn't announced until when the giveaway will last, so if you want the game, you better download fast.
Source: The Verge