Open-world sandbox hacking game Watch Dogs has surpassed the 4 million marker for copies sold to customers in its first week, Ubisoft announced today.

According to the press release, this humble feat makes it the best-selling new franchise launch in history, as well as making it the best first week sales of any Ubisoft game ever. The publisher previously mentioned a goal of six million sales, so its looking on track to reach that number even without launching the Wii U version yet.

Adding onto this rather large number, Ubisoft also revealed that the ctOS mobile companion app has been downloaded more than 1 million times. The app allows players to jump into Watch Dogs' multiplayer and face off against other players as they try to hinder progress and win big on the leaderboards.

Watch Dogs released on May 27th for PC, PlayStation 4, PlayStation 3, Xbox One and Xbox 360. A Wii U version is scheduled for release later this year. Miss our Watch Dogs review? Check it out for full impressions on Ubisoft's next big franchise. As always, drop us a line in the comment section on how you are enjoying Watch Dogs.