Sigma Theory: Global Cold War

67KS
Released Nov 21, 2019by Mi-Clos Studio, Goblinz StudioMostly Positive(76% of 1.4K Steam reviews)

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.

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Official stores

Official stores with direct support.

Steam
SteamOfficial
updated
CA$20.49
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GamersGate
GamersGateOfficial
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CA$25.34
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Keyshops

Third-party resellers. Often cheaper, without official store support. Keyshop prices vs Steam →

Gamivo
GamivoKeyshop
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Lowest price
-96% vs SteamCA$0.75
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K4G
K4GKeyshop
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-96% vs SteamCA$0.77
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Eneba
EnebaKeyshop
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-96% vs SteamCA$0.88
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Instant Gaming
Instant GamingKeyshop
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CA$20.49
-92% vs SteamCA$1.59
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Loaded
LoadedKeyshop
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CA$29.99
-72% vs SteamCA$5.79
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Multipacks (2)

DLCs (3)

About Sigma Theory: Global Cold War

STORY

From the creators of the award-winning sci-fi game Out There...

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.


Recruitment
First, recruit a team of four special agents from 50 unique unlockable characters to support your missions. Each comes with their own story, motivations and traits that define their behavior during missions.
Access the investigator, soldier, hacker, seducer and other archetypes to complete your Sigma division and execute your strategy.


Espionage
When your team is ready, assign them missions around the world to gather scientists, discover compromising documents on local politicians, and more.
Exploit your agents’ abilities to seduce, manipulate and bribe your targets over to your side or have them neutralized.


Counter-espionage
Other nations will also use their agents to infiltrate your country and seize your scientists. Track, capture and interrogate them to gain information on your enemies, then exchange them for ransom when they are no longer useful.


Exfiltration
Order your agents to exfiltrate scientists recruited to your cause during gripping turn-based exfiltration phases through the world’s greatest capitals. Choose the position your drones wisely to support these delicate missions.


Diplomacy
In Sigma Theory, diplomacy is the key to achieving your goals. Meet your foreign counterparts and further your objectives using flattery, threats or blackmail. You can also recover your captured agents, advance your research, and much more. Develop your relations with powerful lobbies and armed and influential groups to obtain their favor. But be careful, they may turn on you.


Tech Tree
Sigma Theory is the cause of this cold war. Rally scientists from around the world to your cause to discover new technologies to gain the edge and change the world. Mind control, destabilization of the world economy, robot soldiers, immortality… Will you keep these discoveries for yourself or share them with the world?

Games that inspired us:

XCom, Phantom Doctrine, Plague Inc, Pandemic (board game), Rocket Ranger, Tropico, Armello, Civilization, curious expedition and so much more

Game details

Sigma Theory: Global Cold War price history

Lowest tracked price: CA$0.64 (Jul 15, 2026) · current best: CA$0.75 across 7 stores.

Sigma Theory: Global Cold War player count & reviews

76% positive reviews all-time · 4 peak players in the last 30 days.

Sigma Theory: Global Cold War — frequently asked questions

Where can I buy Sigma Theory: Global Cold War at the cheapest price?

Right now the cheapest offer for Sigma Theory: Global Cold War is CA$0.75 at Gamivo. KingsPrice compares 7 offers from 7 stores — official stores and keyshops — and refreshes prices throughout the day.

What is the lowest price Sigma Theory: Global Cold War has ever been?

The lowest price KingsPrice has tracked for Sigma Theory: Global Cold War is CA$0.64 (recorded on Jul 15, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.

How many people play Sigma Theory: Global Cold War?

Sigma Theory: Global Cold War peaked at 4 concurrent players on Steam in the last 30 days (highest on Jul 19, 2026). The player chart on this page updates daily.

Is it safe to buy a Sigma Theory: Global Cold War Steam key from a keyshop?

Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →

How can I get Sigma Theory: Global Cold War at a discount?

Create a free price alert on this page and KingsPrice will email you when Sigma Theory: Global Cold War drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.

System requirements

Minimum

Minimum:
  • OS *: Windows Vista
  • Processor: 1,3 GHz CPU
  • Memory: 1 GB RAM
  • Graphics: NVIDIA GT 440 or AMD Radeon HD 5550 w/ 512 MB
  • Storage: 1 GB available space

Recommended

Recommended:
  • OS *: Microsoft® Windows® 7
  • Processor: Dual-core 2Ghz CPU
  • Memory: 2 GB RAM
  • Graphics: DirectX® 10 compliant graphics card
  • Storage: 1 GB available space

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