NOTICE: Activation key must be used on a valid Steam account. Requires internet connection.
About the game
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.
Games that inspired us:
XCom, Phantom Doctrine, Plague Inc, Pandemic, Rocket Ranger and so much more
1. Register an account
Go to www.steampowered.com and click 'login' at the top right corner of the website. After that, press 'Join Steam' in the middle of your screen to create your account.
2. Download Steam
Click the green button that says 'Install Steam' at the top right corner of the website, install Steam and login with with the account you created in step 1.
3. Click 'Games' at the top of your screen and select 'Activate a product on Steam'
4. Open the confirmation e-mail you received from Startselect and copy the code into the 'Product Code' box.
5. Confirm the code and install the game
6. You can access your games by clicking 'Library' at the top of your screen.
7. After the download is completed, you can enjoy your game!
Now on Startselect!
Now available at Startselect: Sigma Theory: Global Cold War. At Startselect you can purchase your digital games and gift cards anywhere and anytime. All of our products are fully authorized and supported by the publisher or developer.
Do you want to purchase this product? Just pick one of the payment methods, check out and you will receive your digital code almost immediately in your mailbox. If you run into any problems or if you have a question, our support team is standing by. We want to give you the easiest shopping experience, so you can use your product straight away!
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