Sigma Theory
by Plug In Digital
· Strategy
· $6.99
On Google Play since November 2022
· Data updated
Sigma Theory is made and published by Plug In Digital. AppBrain is an independent app data site and isn't affiliated with Plug In Digital. The app name, icon, screenshots and description belong to Plug In Digital and are shown as published on Google Play.
AppBrain's verdict
Well rated- Total installs
- 12 thousand
- Rating on Google Play
- 4.03
- 149 ratings
- Last updated
- October 13, 2025
Sigma Theory has 12 thousand installs. Users rate it well: 4.0 stars from 149 ratings.
Installs
Tracked by AppBrain- Last 30 days
- 170
- Play install range
- 10+ thousand
- Launched
- November 2022
Installs over time
Sigma Theory has been installed 12 thousand times. Over the past 30 days, it has been installed 170 times.
Rankings
Google Play top chartsGoogle Play Rankings for Sigma Theory
This app is not ranked
Competitors
Similar apps and more from Plug In Digital
Releases
Updates seen on Google Play- Version
- 1.2.12
- Launched
- November 2022
User feedback
Ratings and reviews on Google PlayGoogle Play Rating history and histogram
Comments on Sigma Theory for Android
★★★★☆
Vinícius Dias
· Dec 12, 2025
The lack of a tutorial was an incredibly bad decision. This game, although not difficult, is very far from intuitive. There are quite a few ways to get an edge over other countries and what to focus on during espionage, so as long as you've got the basics down, it's a good time to explore with agents. And that's about it... Replayability is limited by your interest in the spies and whether you're willing to make them work, but it can only get you so far. Overall, it's ok for play pass.
★★★★★
Adrian Nicolicea
· Nov 19, 2025
Decent game, good replayability, good decision-making, nice graphics, cute story, cute endings, but it gets too repetitive. Wife mechanic also sucks is more of a negative wildcard than anything. Great experience overall, played for 3 days like crazy.
★★★★★
L
· Mar 21, 2026
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
★★★★★
Riley Chance
· Aug 18, 2023
Own about this and the PC copy, this runs leagues smoother than the PC copy of this game. And it's fun too. Sigma Theory AKA politician having a heart attack simulator is you taking the perspective of a spymaster and diplomat who's trying to help your country win a Cold War for new technologies that will redefine what it means to be human. I will not spoil the god tier ending. But be warned that there is a pun intended somewhere in this. So synchronize the Doomsday Clock to 1 a.m. and have fun
★☆☆☆☆
Sweet Balls
· Jan 1, 2023
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!
★☆☆☆☆
Chico
· Nov 14, 2022
I bought this game and the added content. For some reason unknown to me, it says I was refunded, and now my bought content is locked. Fix this bug. Bought the bundle again and after a few days it refunded me again... smh
★★☆☆☆
Adam K Bice
· Feb 24, 2026
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 play through.
★☆☆☆☆
Suellen Laing
· Oct 18, 2022
Can't even start the game, recruitment failed, recruitment failed fine...game failed to interest me then
Technology
Found in the app by AppBrain- Ads
- No ads
- Price
- $6.99
- Libraries
- 32
- App size
- 148.3 MB
- Needs Android
- 5.1+
- Content rating
- Medium
Technologies used by Sigma Theory
10 permissions
·
32 libraries
Subscribe to see full permission and library details
About the app and developer
About Sigma Theory
Sigma Theory is a strategy app developed by Plug In Digital.
Install Statistics
Sigma Theory has been installed 12 thousand times. In the last 30 days, the app was installed 170 times.
User Ratings
Sigma Theory is rated 4.03 out of 5 stars. The rating is based on 150 ratings.
App Information
Sigma Theory costs $6.99. The app size is 148.34 MB. The latest version available is 1.2.12. The last update was on October 13, 2025.
Technical Requirements
Sigma Theory requires Android 5.1+ or higher. The app has a content rating of Medium Maturity. The app has been available on Google Play since November 2022.
App Performance Report
Get a detailed PDF report for Sigma Theory with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more
Get PDF Report — $29Developer information for Plug In Digital
Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.
I'm the developer of this app
Store listing
By Plug In Digital, from Google Play“Global Cold War”
Screenshots by Plug In Digital, from the Google Play listing
Description by Plug In Digital Written by the developer, not by AppBrain. Click to read.
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.
Recent changes:
Bug fixes and improvements
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.
Recent changes:
Bug fixes and improvements