Sigma Theory: Global Cold War

Sigma Theory: Global Cold War

Mi-Clos Studio · November 21, 2019 · Political Sim, Politics, Turn-Based, Management, Turn-Based Strategy

Buy Sigma Theory: Global Cold War from Eneba at $0.59 — the cheapest of 18 stores we compare.

PC
Mostly Positive76% · 1,386
Best price 57 Good deal
$0.59-87%
lowest tracked $0.32
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Where to buy Sigma Theory: Global Cold War — official stores

GOG
GOG
Standard Edition · DRM-Free
-75%
$4.49
$17.99
Buy
GamersGate
GamersGate
Standard Edition · Steam
-10%
$16.19
$17.99
Buy
GamesPlanet
GamesPlanet
Standard Edition · Steam
-10%
$16.19
$17.99
Buy
WinGameStore
WinGameStore
Standard Edition · Steam
-5%
$17.09
$17.99
Buy
GreenManGaming
Standard Edition · Steam
$17.99
Buy
Steam
Steam
Standard Edition · Steam
$17.99
Buy
MacGameStore
MacGameStore
Standard Edition · Steam
$17.99
Buy
Humble Store
Humble Store
Standard Edition · Steam
$17.99
Buy
IndieGala Store
IndieGala Store
Standard Edition · Steam
$17.99
Buy
Nuuvem
Nuuvem
Standard Edition · Steam
$17.99
Buy

Cheapest Sigma Theory: Global Cold War keys — keyshops

Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.

Driffle INC
Standard Edition · Steam
$0.65
Buy
Eneba
Standard Edition · Steam
$0.59
Buy
Gameseal
Standard Edition · Steam
$0.59
Buy
CJS CD Keys
CJS CD Keys
Standard Edition · Steam
$1.62
Buy
Loaded
Standard Edition · Steam
-80%
$4.09
$20.59
Buy

Some store links are affiliate links — playze may earn a commission at no extra cost to you. It never changes the price you pay, and the cheapest option is always shown in the Best price box above.

Sigma Theory: Global Cold War price by region

Sigma Theory: Global Cold War costs £0.26 in the United Kingdom, €0.29 in Europe (EUR), $0.59 in the United States, zł1.61 in Poland, R$3.36 in Brazil, $4.49 in Georgia (USD), CA$5.09 in Canada, NZ$5.82 in New Zealand and A$6.49 in Australia right now.

Cheapest Sigma Theory: Global Cold War offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Kingdom £0.26 −93% £3.85 £0.26 15
Europe (EUR) €0.29 −94% €4.49 €0.29 18
United Statesyour region $0.59 −87% $4.49 $0.59 18
Poland zł1.61 −90% zł16.25 zł1.61 14
Brazil R$3.36 −75% R$8.75 R$3.36 13
Georgia (USD) $4.49 −75% $4.49 — 13
Canada CA$5.09 −75% CA$5.09 — 13
New Zealand NZ$5.82 −75% NZ$5.82 — 12
Australia A$6.49 −75% A$6.49 — 13

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About Sigma Theory: Global Cold War

✦ AI summary

Sigma Theory: Global Cold War puts you in charge of your nation's covert operations to recruit the world's elite scientists and seize control of a world-altering discovery before rival superpowers do. Command special agents across turn-based espionage missions involving seduction, blackmail, and tactical drone support while navigating diplomatic intrigue with over 100 NPCs and managing a dynamic cold war that spans the globe's greatest cities.


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

Sigma Theory: Global Cold War — game info

Platforms
Windows, macOS, Linux / SteamOS
Player modes
Single-player
PC Game Pass
Not included
More games like this:Mac gamesLinux games

DLC & expansions

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Base game + 2 of 2 DLC at today's best prices.

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What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

✦ AI summary

Players appreciate the game's unique board game-like spy strategy concept with engaging turn-based gameplay and strong thematic elements like scientist recruitment, though many find the learning curve steep due to poor tutorials and lack of explanation. The main criticisms center on balance issues where player actions feel ineffective or predetermined, randomness that can feel unfair (high stats still failing), and limited emergent gameplay that often feels more like solving a puzzle with one correct solution rather than offering meaningful strategic choices. While fans of niche strategy games

Recommended May 23, 2026
This is a unique game, nothing quite like this in the market. It is basically a board game. You play as a boss of secret organization that tasked you to help your chosen country to win the tech rush, basically whoever earn most point the fastest win while at the same time keeping a doomdays clock as high as possible. The game itself doesn't explain itself well and the tutorial is barebone, the first wall every potential player will find it hard to overcome. But once you get the gist of it the game is very fun to play. A run took about an hour or two. The music blends in well and match with the spy theme. The random chances are there but you can guide it to your favor with preparations. There are no significant bug that I am aware while playing. No multiplayer though, there are not much point in unlocking more agents once you figure out the best agent of the role you want for the country you play. The AI does cheat with an unrealistic pace even if you are doing well. There are no room for roleplay or doing specific challenge (like pacific only or war crime only) because of the RNG which may limited your fun time of the game. There are almost no benefit or significant reward if you…
3 found this helpful
Not recommended Aug 9, 2026
TL;DR. Don't ever buy this game for its $18. If you REALLY want to try it out, you should get it at least 70% off. A scientist in my team decided to indulge in a side project to induce sapience in animals. She came back a few days later having died and uploaded her brain into a dog, which could be sent out as the best agent in the game. Another scientist came to me and demanded she get her performance heroin back. I picked the option to tell her if it's so good with enhancing performance, she should share it with the science team. She went "hell yeah" and ended up overdosing herself and a different scientist to death and instantly researched multi-dimensional gate. I sent a korean hacker to Russia so that her international hacking activities wouldn't trace back to my country. I noticed both russian scientists were bisexual and ordered her to seduce them. So she became permanently stationed in Russia keeping watch on her polycule and deleting arrest warrants in Britain, which in my mind she's doing it while sipping coffee in Star Coffee shops. (Starbucks pulled out of Russia in 2022, fun fact) This sounds incredibly fun! So why am I not recommending this game? This game is shal…
2 found this helpful
Recommended May 25, 2026
This is a very niche genre with most games being a disappointment. This game is okay. I would recommend it to try if you want a spy/diplomatic strategy game. My main complaint is that not all things seem balance is what you can do. It can also feel a bit more like a puzzle than a strategy game.. I define puzzle in that there ends up being 1 clear way of solving something. Still.. i give a positive cause this genre is fun to me and they at least made something fun.
1 found this helpful
Not recommended May 22, 2026
Everything fails. Is your guy 7+ intelligence? Guess what?! He can't hack anything. Is your guy 6+ strength? Guess what?! Can't extract anyone. Anything happens and the governments panic. Do nothing.....same outcome.
1 found this helpful
Recommended Aug 10, 2026
Best map game of all time. Once you start prioritizing hacking and diplomacy, the game becomes a lot less punishing. Wolf the goat.
Recommended Jun 17, 2026
Played once thru so far. I almost resigned since I was so far behind in research, but i caught up and passed everyone to win. Was that a fluke or a flaw in the game? There's just enough to do each turn to make the gameplay interesting. You have to think a few steps ahead when you want to grow your pool of scientists without losing agents. Graphics are simple but appealing and the iconography is clear. I especially like identifying and recruiting scientists - real OPSEC stuff. Looking forward to trying again with new agents.

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