The story of Child of Eden is revealed through the game's introduction. It focuses on a girl named Lumi who was the first human to be born in space, on 11 September 2019 aboard the International Space Station. Throughout her life, Lumi dreamt of visiting Earth, conveying her feelings into song which she sent down to the people of the planet. When she died her body was preserved and her memories and data were recorded and archived. The story moves to humanity's advancement in space exploration, and the creation of a universal wide internet system called Eden. Eden is described as a fountain from which all knowledge flows, to those who have never set foot on Earth, containing all of human history and knowledge. By the 23rd century scientists attempt to use Lumi's preserved data to create a living persona with Eden itself, in an experiment called Project Lumi. As her recompiled persona emerges and awakens into Eden, she is attacked and trapped by an unknown computer virus.

Set in Chicago, where a central network of computers connects everyone and everything, Watch_Dogs explores the impact of technology within our society. Using the city as your weapon, you will embark on a personal mission to inflict your own brand of justice. Chicago's overarching network is known as the Central Operating System (ctOS), and it controls almost all of the city's technology and information - including key data on all of the city's residents.

In 2016, ctOS 2.0, an advanced operating system networking city infrastructure, was implemented in several US cities to create safer, more efficient metropolises. Play as Marcus Holloway, a brilliant young hacker living in the birthplace of the tech revolution, the San Francisco Bay Area. Team up with Dedsec, a notorious group of hackers, and expose the hidden dangers of ctOS 2.0, which, in the hands of corrupt corporations, is being wrongfully used to monitor and manipulate citizens on a massive scale.