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PC 17,99 € Region ES
Juegos Simuladores Sigma Theory
Sigma Theory — imagen de cabecera
Mature content
Simuladores · Mi-Clos Studio

Sigma Theory

Sigma Theory
Mature content
Windows macOS Linux
Mostly Positive · 76% of 1,381
DesarrolladorMi-Clos Studio
17,99 €
Get it at steam
Wait Chip's verdict · BE updated 27 days ago

Good game, but it sits 100% of the way from its all-time low to full price. It drops harder in seasonal sales. Patience pays.

Why this verdict
Price position between all-time low and full price 100%
All-time low €4.49 · 11d ago
Player reviews 76% positive of 1,381
Quality score 76/100
Value score 0/100

Offers

Accepted regional prices from official stores

Official stores (1)
steam
checked 27 days ago Best price
steam, Official, €17.99
€17.99 Buy at steam
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DLC (3)

Add-on content for this game

Packs and bundles (2)

Multi-item packages that include this game

About this game

What this game is, in the developer's words

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.

Check our upcoming games!



A new country added!


About the Game

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

Media

Trailers and screenshots straight from the store page

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Price intelligence

Accepted price history and the lows that matter

Historical lows
All-time low ATL €4.49 2026-07-05
3-month low €4.49
12-month low €4.49
Current €17.99
Price events From the accepted price history · updates automatically
Jul 9, 2026
Sale ended · back to €17.99
Jul 5, 2026
New all-time low €4.49

Sigma Theory price history and best deals

Sigma Theory for PC currently sells from 17,99 € at authorized stores. Its all-time low is 4,49 €, set on 2026-07-05.

Frequently asked questions

Answered from this game's own price and edition data

Should I buy Sigma Theory now or wait?
Our verdict is wait. At 100% of the way to full price, it usually drops harder in seasonal sales, so patience tends to pay.
Is 17,99 € a good price for Sigma Theory?
17,99 € sits 100% of the way from the all-time low of 4,49 € to the full price. It has been cheaper before, so there is room to wait.
Where can I buy Sigma Theory?
Sigma Theory is tracked at steam. We only list authorized stores here and always link out with a clean outbound link.
Scores
Steam reviews Mostly Positive · 76%
76% positive of 1,381
Media (15)
Tech
Requirements
System requirements platform
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
Minimum
Minimum:
  • OS: Mac OS X 10.7
  • Processor: Dual Core 2Ghz
  • Memory: 2 GB RAM
  • Graphics: Hardware Accelerated Graphics with dedicated memory
  • Storage: 500 MB available space
Minimum
Minimum:
  • OS: Ubuntu 12.04+
  • Processor: 1,3 GHz CPU
  • Memory: 2 GB RAM
  • Storage: 1 GB available space
Recommended
Recommended:
  • OS: Ubuntu 12.04+ Desktop only
  • Processor: Dual-core 2Ghz CPU
  • Memory: 4 GB RAM
  • Storage: 2 GB available space
Facts
DesarrolladorMi-Clos Studio
EditorGoblinz Publishing
Links
Clasificaciones
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igrs18
steam_germany12
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