Mi-Clos Studio
Based in Lyon, France

Release date:

PC / Mac / Linux


Regular Price:

Desktop: TBC


Sigma Theory is a single-player near-future espionage strategy game that takes place during a new cold war. You will play as the head of your nation’s Sigma Division, racing other countries in a Manhattan Project-style competition to exploit a radical new scientific breakthrough. How far will you go to control the future?


From the creators of the award-winning sci-fi game Out There... In the near future, a paradigm-shifting scientific discovery looms over the world, promising radical new technologies. The world’s superpowers realize they could have the power to destroy the global financial system, wipe out entire countries or even gain access to immortality. However, this discovery — called “The Sigma Theory” — can only be harnessed by a handful of scientists. You are placed at the head of your country’s Sigma division. Your objective is to ensure that it is your nation that reaps the benefits of Sigma Theory before anyone else. To achieve this you will have powerful resources at your disposal: a cadre of the world’s most elite covert agents, advanced tactical drones and, of course, your own skills in diplomacy and subterfuge. It’s a cold war out there, one in which mankind must face up to its future.


  • A bold new take on the espionage game genre, set during a future global cold war
  • Recruit your team from 50 unique spies and field agents
  • Turn-based strategical and tactical-level gameplay
  • Order your spies to conduct operations all over the world
  • Experience tense and thrilling exfiltration missions where you guide your agents on a covert operation to extract high-value targets from foreign cities
  • Infiltrate the enemy’s Sigma programs, abducting, coercing, and seducing scientists to your side
  • Deploy your drone fleet to turn operations in your favor
  • Deceive or cooperate with your rivals during diplomatic summits
  • Use your diplomatic skill to balance the demands of multiple relationships: with your agents, with your superiors, with powerful private lobbies, and with your counterparts around the world
  • Discover 30 world-changing technologies
  • Hoard Sigma Theory discoveries for yourself to gain an edge in the cold war — or share them for the benefit of all mankind — or sell them to powerful private lobbies bent on preserving the old world order
  • Experience a dynamic emergent narrative where every decision matters and the complex web of character relationships means that no two games of Sigma Theory will ever be the same
  • Multiple distinct endings that respond to the player’s ethical and practical decisions throughout the game


Private Beta Trailer YouTube

Teaser Trailer YouTube


download all screenshots & photos as .zip (3MB)

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Awards & Recognition

  • ""

Selected Articles

  • "The world also needs more games from the creators of Out There."
    - Graham Smith, Rock, Paper, Shotgun
  • "Imagine something like House of Cards, where the higher you climb the greater the fall if you fail."
    - Owen Faraday, PocketTactics

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About Mi-Clos Studio

The team behind Out There is composed of Mi-Clos Studio, which is lead by Michael Peiffert, and FibreTigre. Together, they have launched the mobile hit Out There to the universe.

More information
More information on Mi-Clos Studio, our logo & relevant media are available here.

The Sigma Theory Credits

Michaël Peiffert - Mi-Clos Studio
Founder, Creative Director, Art

Game Designer, Writer

Siddhartha Barnhoorn
Music and Sound

Johann Verbroucht
Programmer - Goblinz Studio

Benjamin Carré
Character Design

presskit() by Rami Ismail (Vlambeer) - also thanks to these fine folks