Sigma Theory

Sigma Theory

Plug In Digital·4.0 ★·$6.99

Screenshots

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Description

Sigma Theory is a Turn-based Strategy game in a futuristic global cold war from the award-winning creators of Out There. Recruit a squad of special agents and run your intel agency to secure the control of the singularity.

STORY
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.

THE ULTIMATE ESPIONAGE SIMULATION
Turn-based espionage: Use your special agents to dominate the world. Seduction, blackmail, manipulation, industrial espionage… Every low blow is both permitted and encouraged.
Dynamic narrative: Develop and manage your relations with over 100 NPCs: lobbies, armed groups, politicians… Alliance, deception or assassination, you choose.
Field operations: Direct the kidnapping of your targets during gripping pursuits through the world’s greatest cities. Discretion or direct confrontation, your agent’s life is in your hands.

Developer

Plug In Digital

Developer ID: 5963443096922659076

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Ratings & Reviews

4.0

158 ratings

10,000+ downloads

5★
57%
4★
9%
3★
15%
2★
9%
1★
9%

Recent Reviews

Christin Franklin

v1.2.12

very cool once u get the hang of it

Apr 27, 2026

Ananta Zukti

v1.2.12

funnest game..

Apr 8, 2026

L

v1.2.12

I cannot recommend this game followed by their (sequel?) Over the Omega enough! I had downloaded both games on the same day, not realizing they were made by the same creator. I started with Over the Omega and then played this game a week later. Only after finishing Sigma Theory did I realize how deep and artistic these two games are! Great for people who enjoy strategy games, asset management with a lot of involved storytelling! Great for exploring ideas of what makes us human. Kudos to the Devs

Mar 21, 2026

Charles L Chargualaf

v1.2.8

Sigma theory oh wow

Mar 2, 2026

Adam K Bice

v1.2.12

A tutorial would be nice. Choose story mode as it seemed to be a regular game "enhanced with a personal narrative." The Classic mode may have a built-in tutorial, but it should really be an option presented to the player before starting any first-time playthrough.

Feb 24, 2026

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