Kinguin logo

Welcome home, player!

By clicking Continue with Google or Facebook, you agree to Kinguin's Terms & Conditions and Privacy Policy, also to NFT Terms & Conditions and NFT Privacy Policy.

New to Kinguin?
Sign up now!
(0 Reviews)
Sigma Theory: Global Cold War Complete Edition Steam CD Key
Sigma Theory: Global Cold War Steam CD Key

Sigma Theory: Global Cold War Complete Edition Steam CD Key

Sold by
99.16% of 73536 ratings are superb!
Your transaction is secure
We're working hard to protect the security of your payments. We have a dedicated Fraud Prevention and Response Department working 24/7 to ensure safe transactions. We have implemented custom systems to screen out potential scammers and we have partnered with Ravelin, one of the world's best fraud prevention platforms. We don't share your payment details with third-party sellers and we don't sell your information with others.
Key activation
Release date: 25/06/2020


  • Base game
  • Sigma Theory: Brazil - Additional Nation
  • Sigma Theory: Nigeria - Additional Nation

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.

Sigma Theory: Brazil - Additional Nation

This DLC adds a new playable nation: Brazil.
Content includes:

  • 4 new Brazilian agents: Ward, Playboy, Babel and Slaver
  • 2 Brazilian scientists
  • Brazilian diplomat
  • Exfiltration in the city of Brasilia, Brazil
  • Brazil trait: your first agent gets Ghost trait

Sigma Theory: Nigeria - Additional Nation

This DLC adds a new playable nation: Nigeria.
Content includes:

  • 4 new Nigerian agents: Warrior, Peace, Pure and Dealer
  • 2 Nigerian scientists
  • Nigerian diplomat
  • Exfiltration in the city of Abuja, Nigeria
  • Nigerian trait: your country is immune to armed groups

Product Rating
Write a product review and claim a 5% discount for your next purchase!
Automatic translation
Few words from NERD... Pros: - cool and quite fresh gameplay - lot of agents to unlock - not obvious way to win - nice field actions - i felt like true intelligence agency boss - nice to eye graphic Cons: - repeatable actions could be boring after few hours of play - i would see more DLCs with more countries Overall score 8/10.
Automatic translation
Nigeria DLC brings 4 additional characters, 2 new scientists and one region to play. Maybe it's not total gamechanger, but DLC some fresh scent and more fun to very cool basic game.