Running for eight weeks beginning in November, the transmedia title is releasing as a partnership between Orange and Lexis Numérique.
Copyright: OrangeThe episodic paranormal thriller promises to bridge the gap between gaming, social networking and traditional storytelling.
Players will decipher clues via a series of traditional and casual games on their computers, smartphones, tablets and social networks.
Users are encouraged to work together to unravel the mystery, which centres around a series of kidnappings in Europe.
The game's hub will take the form of a newsfeed, allowing users to actively or passively participate in the adventure. Players can view each episode like a movie, or can actively engage in the adventure by searching for codes and clues online.
One example sees players searching for a code by investigating a video, checking vehicle licence plates and running names through Facebook.
Missing a week due to outside commitments will trigger catch-up mode, while users can also access a series of optional hints.
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Speaking to Digital Spy at gamescom, Lexis Numérique's Djamil Kemal described the game as hugely challenging, revealing that the biggest difficulties will be managing the community and ensuring there are no plot holes.
It was also announced that the game will be available for free during the first week, and will be offered at a discount price for customers buying the entire series.
Watch a trailer for Alt-Minds below: