Sigma Theory v1.2.12

Plug In Digital

• In-app purchases

About this app

Developer Description

Global Cold War

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.

What's New

Bug fixes and improvements

In-app purchases

$0.99 - $2.99 per item

Version Information

Version: 1.2.12
Downloads: 5K+
Updated on: Jan 9, 2026
Released: Oct 14, 2022
Requires: Android 7.0

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Sigma Theory - Google Play Rankings

Rank	Country	Category	List	Change
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No ranking data available yet. Rankings are updated daily.

#53 in Top Paid Strategy in France

#52

Papa's Paleteria To Go!

#53

Sigma Theory

#54

2112TD: Tower Defense Survival

Sigma Theory users say on Google Play

★★★★★

Michael Sing

Amazing game just like the PC version. The only issue on my phone is if I toggle to another app and return to the game the audio stops works until I restart the app. The game saves still. The game is worth the money!

★★★★

sPiRaL aRchiTeCt

Very cool xcom like. there's a lot to digest. app switiching audio glitch fixed & it appears fonts were enlarged to compenstae for mobile screens. should serve as a cautionary tale for all international tyrants. that doomsday clock is no j0ke.

★★★

DasGute14 youtube

Tell me how I eliminate all the police with a drone strike and still get caught by those police? necromancy?

★★

Samer Khawaldeh Hernandez

Game is very fun but has game breaking bugs the dog replaces the dog even when you dont want too you end up with having 5 agents but only 4 or if an agent gets arrested they also fly back home at the same time. Or my favorite which breaks the game completely unplayable after a cut scene or a mission extraction you can't click anything or move the map at all rendering the game impossible to continue and yes they keep refunding the dlc twice i bought it twice refunded

★

Sweet Balls

I only give it one star because I already pay $6 for this game, only for the countries I always main in the Steam version (USA, China, South Korea and Germany) to be in the pay wall for another $4?! Which is all free in the Steam version ffs! Those countries are not even unlockable here in mobile version once you finished the game using the free countries you have. Steam version dlcs only have Nigeria and Brazil in the paywall and they cost $2 each. Sheesh!