Confused on Steam Play and Proton? Be sure to check out our guide.
We do often include affiliate links to earn us some pennies. See more here.

Grab a free copy of Sigma Theory: Global Cold War on GOG

By - | Views: 16,484

Fancy another free game during the GOG Summer Sale 2023? They're now giving away Sigma Theory: Global Cold War along with lots of games on sale.

From the creators of 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.

If you've never seen it before check out the trailer:

YouTube Thumbnail
YouTube videos require cookies, you must accept their cookies to view. View cookie preferences.
Accept Cookies & Show   Direct Link

The Sigma Theory giveaway ends June 19th, 1 PM UTC. How to claim? Scroll down on the GOG homepage when logged in and you'll see the giveaway banner.

A reminder of some other GOG curated lists you can take a look through (their descriptions not mine):

  • Cyberpunk essentials collection – dive into cyberpunk themed games and receive a Gift (e.g. Deus Ex: Mankind Divided - Digital Deluxe Edition, Ghostrunner, Neon Abyss).
  • Classics – Good Old Games that are near and dear to hearts (e.g. The Elder Scrolls V: Skyrim, Diablo + Hellfire, SWAT 4 – Gold Edition).
  • Indie – discover hidden games that might have swept under your radar (e.g. This War of Mine: Complete Edition, Little Nightmares, Outlast).
  • RPG – embark on a great adventure full of rich storytelling (e.g. EVERSPACE™ 2, Dragon Age™: Origins - Ultimate Edition, ELEX II).
  • Best games of each decade – the name of the collection speaks for itself (e.g. King's Quest 1+2+3, Dungeon Keeper™ 2, STAR WARS™ Empire at War: Gold Pack).

Have you picked up anything good? Let me know in the comments.

Article taken from GamingOnLinux.com.
8 Likes
About the author -
author picture
I am the owner of GamingOnLinux. After discovering Linux back in the days of Mandrake in 2003, I constantly came back to check on the progress of Linux until Ubuntu appeared on the scene and it helped me to really love it. You can reach me easily by emailing GamingOnLinux directly. Find me on Mastodon.
See more from me
1 comment

Klaas Jun 18, 2023
I think it's weird to call This War of Mine hidden; it's a very visible indie game.
While you're here, please consider supporting GamingOnLinux on:

Reward Tiers: Patreon. Plain Donations: PayPal.

This ensures all of our main content remains totally free for everyone! Patreon supporters can also remove all adverts and sponsors! Supporting us helps bring good, fresh content. Without your continued support, we simply could not continue!

You can find even more ways to support us on this dedicated page any time. If you already are, thank you!
Login / Register


Or login with...
Sign in with Steam Sign in with Google
Social logins require cookies to stay logged in.