Ubisoft has reconfirmed that Watch_Dogs can be played completely offline. Although the upcoming open-world game doesn’t require an Internet connection, players who connect online will be able to enjoy extra features, like a multiplayer mode in which you can try to hack another player via controlling surveillance cameras. Watch_Dogs will be released November 19th on multiple platforms, including Wii U, PlayStation 3 and Xbox 360.
A: There is no online requirement. You can play Watch Dogs without an Internet connection_
— Watch Dogs (@watchdogsgame) July 21, 2013