In the video game Watch Dogs, player-character Aiden Pearce hacks a citys streetlights, drawbridges, ATMs and more — just by tapping on his smartphone. The near-future version of Chicago in which the game takes place is tied together by a citywide operating system called ctOS, which connects everything from traffic lights and ATMs to cars and cellphones — and also collects reams of personal data on each citizen into allegedly private profiles. Manipulating the city through ctOS forms the core of the players actions in the game, as well as the story.