# Sigma Theory — Global Cold War

> Turn-based espionage strategy game set in a futuristic global cold war. (iPhone/iPad app by Plug In Digital.)

- Source: https://appshunter.io/ios/app/sigma-theory/id1492483961 (this page in markdown: same URL + `.md`)
- Developer: [Plug In Digital](https://appshunter.io/developer/608306412)
- Category: Games, Entertainment, Action, Strategy
- Price: $6.99 with in-app purchases
- Rating: 4.50/5 from 8 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 388 MB
- Languages: French (France), German (Germany), American English, Chinese (Simplified, China), Russian
- Released: 2022-10-18
- Data updated: 2026-08-28
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/sigma-theory/id1492483961/reviews.md

## What is Sigma Theory?

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.

## Key features

- Turn-based espionage gameplay
- Recruit and manage special agents
- Dynamic narrative with over 100 NPCs
- Field operations in global cities
- Diplomacy and subterfuge mechanics
- Futuristic global cold war setting

## Pricing and in-app purchases

Base price: $6.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| USA Pack | $0.99 | one-time |
| China | $0.99 | one-time |
| Germany | $0.99 | one-time |
| South Korea | $0.99 | one-time |
| Nigeria | $0.99 | one-time |
| Brazil | $0.99 | one-time |
| Special Offer: All DLCs | $3.99 | one-time |


## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/sigma-theory/id1492483961/reviews.md

### 2/5 — Fun Concept

*2024-01-25*

The game is a decently entertaining, light strategy game. The 100+ npcs are barely characters and often have little deviation between stats and skills. The story is passable. Not sure I’d pay full price for this again, and feel that it advertised a depth not present in the game. Also, the RNG used in exfiltration missions is supremely awful.

### 3/5 — Wenig überzeugend

*2023-12-06*

Ja kurzweilig, mit sehr vielen Wiederholungen. Viele Sachen kann ich gar nicht beeinflussen, oder ich habe nicht herausgefunden wie. Generell ein paar mehr Spiel. Infos und Tutorials wären hilfreich. Die kam bei mir leider nicht vor, damit ist mir vieles nicht klar gewesen und worden, was im Spielverlauf eventuell relevant sein könnte. Eventuell ist es aber auch nur so flach, wie ich es erlebt habe. Ich ärgere mich ein wenig, dass ich dafür Geld bezahlt habe.

### 1/5 — Unbelievably wasted potential

*2023-08-19, version 1.0.3*

The developers’ past experience with story-based games and immersive world-building is completely wasted here by a baffling lack of any tutorials, gameplay hints or instructions of any kind.

### 5/5 — Controller is Support 😊

*2022-12-12*

This is a powerful, well woven masterpiece. See YouTube videos. Buy this game. 

Sigma Theory offers so many layers of 

• dialogue
• game mechanics
• strategies

all these game systems flowing harmoniously to give you a wonderful and engaging experience. 

The UI is STUPID SIMPLE 

Therefore, how to go about doing stuff is brainless  - as it should be!  The challenge and stimulations come from the situations you will face. 

This game HAS controller support ⭐️ ⭐️ ⭐️ 
This is a bonus, so many lazy devs now don’t offer controller support. 

Because Sigma Theory offers controller support.. peep how I game:

I play on my N-Real AR glasses (130’ screen) which are connected to my iPhone. 

I’m laying down in bed, head on my pillow, as my AR glasses project a 130’ screen in front of my eyes.

All the while…

My arms rest comfortably alongside me, each hand holding a Nintendo switch joycon - Bliss!

### 4/5 — An Important Bug

*2022-12-03*

I love the game. The more I learn the more interesting it gets.
Like being able to interrogate captured spies.

However, 99% of the time I try to open the window for my own country to review the spies, it will not stay open. It will just flash open and then close. And it seems to matter where I have the country positioned on my screen. It REALLY changes my ability to fully play the game and win.

PLEASE fix this if it is a bug. (I’m using IOS on an iPad Pro)

Thank You!

### 4/5 — Great modern age cold war game

*2022-11-17, version 1.0.3*

Only issue is the dlc is unavailable offline. Otherwise, it’s worth the $

### 5/5 — Really good once you get the hang of it

*2022-11-04*

A bit tricky at first as you learn what works but a really in depth spy game. Massive effort has been put into making this and it shows. Worth the money

### 1/5 — Ummm

*2022-10-26*

It looked good in the App Store description but when it comes to gameplay… how do I play it? What exactly am I supposed to be doing?

### 5/5 — Top

*2022-10-25*

👀

### 1/5 — No instructions or tutorials included

*2022-10-21, version 1.0.3*

This game looks great, but there's no instructions or in-game tutorials to learn how to play.

## Frequently asked questions about Sigma Theory

### What is Sigma Theory about?

Sigma Theory is a turn-based strategy game where players lead an intel agency during a futuristic global cold war. The goal is to secure a powerful scientific discovery for your nation using espionage, diplomacy, and agent operations.

### What kind of gameplay can I expect in Sigma Theory?

The game features turn-based espionage, where you can use seduction, blackmail, and manipulation. It also includes managing relations with over 100 NPCs and directing field operations in various cities.

### Is Sigma Theory available on Android devices?

Based on the provided data, Sigma Theory is supported on iPhone, iPad, and iPod. Information regarding Android availability is not included in this data.

### How often is Sigma Theory updated?

Sigma Theory was last updated on October 18, 2022, with version 1.0.3. Further update frequency details are not provided.

### What is the age rating for Sigma Theory?

Sigma Theory has an age rating of 4+, making it suitable for a wide range of players. This rating indicates general suitability without mature content restrictions.

### Does Sigma Theory have ads?

Yes, Sigma Theory contains advertisements. This is indicated by the 'hasAds' flag being true in the application data.

### What is the price of Sigma Theory?

Sigma Theory is a paid application priced at $6.99. This is a one-time purchase cost for the game.

### How does Sigma Theory compare to Out There?

Sigma Theory is from the award-winning creators of Out There, suggesting a similar quality of narrative and strategic depth. However, Sigma Theory focuses on espionage and global cold war strategy, differing from Out There's space exploration theme.

## Version history (last 4 releases)

### 1.0.3 — 2022-10-18

• Sigma Theory is releasing now!
• Bug fixes and improvements

### 1.0.2 — 2022-10-04

• Bug fixes and improvements

### 1.0.1 — 2022-08-25

• Bug fixes and improvements

### 1.0.0 — 2022-08-23

No release notes.

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All apps by Plug In Digital: https://appshunter.io/developer/608306412

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*