"No, Uplay will not be featured in South Park: The Stick of Truth." Obsidian Entertainment, on whether Steam users would have to use Ubisoft's online platform to play the game. They later clarified that on PC, Stick of Truth would be "a Steam game, with Steam achievements," and that "Uplay was not integrated at all."
Ubisoft says hackers exploited one of its websites to gain access to names, email addresses and encrypted passwords of uPlay members. While no credit card information was compromised, the publisher is suggesting that users change their passwords.