Last updated on January 4th, 2026 at 03:46 pm
Sigma Theory – Strategy Game Review
Sigma Theory is a Strategy/Entertainment/Action game from Plug In Digital, first launched in 18th October 2022.
It’s rated 4+ and currently has 8+ ratings on the App Store.
What Makes Sigma Theory Stand Out
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.
This Strategy game offers engaging gameplay and regular updates for mobile players.
Player Feedback
As a newer release, Sigma Theory is building its player community. Early feedback suggests .
Recent Updates & Development
Latest Update: 18th October 2022
Recent improvements include:
• Sigma Theory is releasing now!
• Bug fixes and improvements
Download & Availability
Sigma Theory is available through the official App Store for iOS devices.
Requirements: Requires iPhone 5s / iPad Air / iPad Air (Cellular) / iPad Mini 2 (Retina) / iPad Mini 2 (Retina, Cellular) / iPhone 6 / iPhone 6 Plus / iPad Air 2 / iPad Air 2 (Cellular) / iPad Mini 3 or later.
Compatible with iPhone and iPad devices.
Player Experience Highlights
Community Insight:
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 dont offer controller support. Because Sigma Theory offers controller support.. Peep how we game: we play on our N-Real AR glasses (130 screen) which are connected to our iPhone. Im laying down in bed, head on our pillow, as our AR glasses project a 130 screen in front of our eyes. All the while our arms rest comfortably alongside us, each hand holding a Nintendo switch joycon – Bliss.
Very cool game, love the intricacies! Clearly well thought out and fun to play. At the moment, it tends to freeze during a turn (like you open up a meeting and you cant close the character, or you have spies without missions, but you cant select anyone). Hopefully, this all gets fixed with an update soon! Already bought the DLC. We can see where Im going to be playing this a lot! (Please make a version of this game for the Infinity Table? Id definitely buy it again there, it would be fun on a large tabletop.).
We love the game. The more we learn the more interesting it gets. Like being able to interrogate captured spies. However, 99% of the time we try to open the window for our 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 we have the country positioned on our screen. It REALLY changes our ability to fully play the game and win. PLEASE fix this if it is a bug. (Im using IOS on an iPad Pro) Thank You.
Only issue is the dlc is unavailable offline. Otherwise, its worth the $.
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 Id 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.
User feedback from Apple App Store
App Details
- Version: 1.0.3
- Size: 388.13 MB
- iOS: 13.0 or later
- Languages: EN, FR, DE, RU, ZH
- Content Advisory:
- Developer: Plug In Digital
Last updated: 18th October 2022 | Genre: Strategy, Entertainment | Developer: Plug In Digital