It seems a lot of people were looking forward to hacking the Windy City, as Watch Dogs has become the fastest selling new intellectual property in all of video game history.

The official Ubisoft blog reports that Watch Dogs set the record by selling more than four million copies in its opening week. That lofty number also makes the best-selling game during week one in Ubisoft history, beating out games like Assassin's Creed and Rainbow Six.

"With such strong sales momentum and positive feedback from gamers, Watch Dogs has positioned itself as the must-have game of the moment," said Ubisoft senior VP of sales and marketing Tony Key. "We’re really proud of this achievement, and are confident that the Watch Dogs brand has a promising future."

The news comes just six days after Ubisoft announced that Watch Dogs set a Ubisoft record for first-day sales, though the company did not disclose that specific figure to the public. The free companion app for tablets and phones, ctOS Mobile, has been downloaded over one million times, making up a fourth of all copies sold. Only one-fourth of the install base using the app seems rather low, but that can be improved as sales continue to rise.

The strong sales of Watch Dogs proves that new IP is not necessarily doomed to underwhelm on the open market, but a lot of credit must be given to Ubisoft's marketing team for keeping the game interesting in the eyes of the public. Without that, these records stay intact.