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Ubisoft Montreal had been working on its own sequel in the "Driver" series at the same time that Ubisoft Reflections had been developing "Driver: San Francisco". Ubisoft Montreal's game had included some elements of hacking the driving environment to the player advantage, such as triggering street lights, as well as being able to swap from driver to driver. When "Driver: San Francisco" released in 2011, it did not do well commercially, leading to the "Driver" title in development at Ubisoft Montreal to have portions reworked into the first "Watch Dogs" game. Ubisoft Reflections subsequently helped Ubisoft Montreal in building out "Watch Dogs" for release, handling most of the driving portions of the game while Ubisoft Montreal handled the details related to on-foot missions and hacking. The game's Disrupt engine was originally intended for this "Driver" game in development.