In the 23rd century the human race has taken to the stars. From your beginnings on Earth, build a civilization that can stand the test of time in the largest space-based strategy game of all time. Join the adventure!
User reviews:
Mostly Positive (115 reviews) - 76% of the 115 user reviews in the last 30 days are positive.
Mostly Positive (5,463 reviews) - 77% of the 5,463 user reviews for this game are positive.
Release Date: May 14, 2015

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Recent updates View all (64)

January 20

Version 2.0 = Dangerous levels of fun


When I rejoined the GalCiv team back in November I warned you that I was out to destroy your lives.

Part 1 of the reign of terror was version 1.9 which made a lot of major AI updates to the game, balance changes, and pacing updates.

But 1.9 was really just a sampling. 2.0 is where things really get into high gear.

You can read my journal on this here:

By far, the biggest change will probably be the arrival of Administrators. The purpose is to let people play vertically (small, powerful empires). The one planet victory challenge has been going well. I got very close to doing it on a large galaxy until I disobeyed the rules and didn't give away planets that were given to me by the Altarians which sparked the Drengin to come calling.

We also did work on various UI changes and diplomacy changes. The big diplomacy change is something that some of my fellow old people reading this will understand: Redlining.

From a coding perspective, when you are negotiating with the AI (or any AI is talking to another AI) the trade deal gets passed around and evaluated.

Seeing that, I decided to add a "redlining" vector to the trade deal where the different AI appraisal functions could comment on the deal and add some of their own vetoes to the deal. This is like in contracts where you send it over to someone and they make changes or comment on it (redlining).

Thus, the AI will start to explain why they not only won't agree to go to war with someone (a previously easy to exploit system) but why.

The feature is implemented but only a bit of text was added (translation has to be done).

By far, my favorite change was also to the diplomacy system. The biggest problem I ran into when I played was that once I reached a certain point, it was all a mop up. If I was the most powerful, nobody would touch me.

Well, now, the AI greatly takes friendships with others into account. This not only helps the AI players resist a powerful player conquering everyone but it is actually quite awesome for those of you who try to play nice only to get the someone declaring war on you. Now, others will go to war with them even if they are less powerful.

This sort of thing will get further tuning but overall, the changes are pretty obvious in a short amount of time.

This update should be publicly available on Thursday.

10 comments Read more

December 13, 2016

Massive v1.9 Update Now Available for Galactic Civilizations III

Your Holiday Present is Here!

Faster Start-Up Times, AI Improvements, New Capstone Techs, and more in v1.9Do you like a good challenge? Then buckle up your space seatbelt and get ready for a ride. Our CEO Brad Wardell has been working on the game and has some serious updates to share! If you’d like to read a bit about his process, check out his posts here and here.

To see everything that went into v1.9, make sure to check out the full change log below.

Some of v1.9’s highlights include:

  • Capstone Techs: Research new techs in the Age of Ascension! These techs provide large (though temporary) empire-wide bonuses that stack as you get them
  • Performance Optimization: A newly enhanced multithreaded system dramatically improves load times and reduces memory usage.
  • A.I. and Balance: The AI has received a bit of a boost! You’ll notice that they are smarter about expanding, building fleets, and spreading influence, and more. Ready for the challenge?
  • Rich, Unique Galaxies: Performance optimizations have allowed the addition of more stars and planets, making galaxies feel even more vast than before.
This massive update has been brought to you thanks to your feedback. As always, we appreciate our community and we absolutely listen to what you have to say. If you have some thoughts on the update, please feel free to let us know in the comments!

v1.9 is now available and waiting in your Steam client.

To see the full list of changes, please check the change log here.

For more information on Galactic Civilizations III, please visit 

51 comments Read more


“The new gold standard in 4X space strategy”
9/10 – GameWatcher

“Such a wealth of victory conditions and customization options that the experience feels new with every playthrough.”
8.6/10 – IGN

“A mix of familiar mechanics and new ideas that can keep both fans and newcomers occupied for a frighteningly long period of time.”
9/10 – Softpedia

About This Game

The human race has finally mastered faster-than-light travel opening up the stars for exploration and colonization. As the leader of the newly formed Terran Alliance, you will guide humanity's expansion into becoming a space-based civilization. Soon, you will discover that we are not alone. Alien civilizations with their own histories and motivations are expanding as well. Research new technology, design starships, negotiate trade and treaties, wage wars, colonize new worlds, construct starbases in the largest 4X strategy game ever made. And when you've finished that, play again as one of the many included alien civilizations each with its own history, technology tree, ship components and more.


Each new game offers an array of options as you set it up - choose your map size, abundance of planets and resources, frequency of events, and more for a unique play experience every time. Galactic Civilizations III also removes linear victory conditions and offers you multiple objectives that you can choose to pursue in order to win, such as military conquest, cultural domination, technological ascension, or political alliances. The new multiplayer capabilities also allow you to expand your challenges and fights beyond an AI in order to face off against fellow players. All of this, topped with a rich and in-depth custom ship designer ensure an immersive and exciting experience as you decide how to rule your galaxy.


  • Never the same game twice: Play in the ultimate sandbox where each game has a unique map, worlds, and challenges to face -- all on a massive scale. Play against 16 to 100 opponents.
  • Multiple paths to victory: Win through military conquest, cultural domination, technological ascension, or political alliance.
  • Create your own history: Each sandbox game lets you create a new future history for your civilization.
  • Story-based campaign: Learn the ancient histories of the alien civilizations and one possible future for the human race.
  • Massive technology tree: Research a technology tree with immense breadth and depth. Each playable faction has their own unique specializations. Your choice determines how you play and win.
  • Faction & Ship Customization: Create a civilization with its own look, ships, technologies, and even options for how the AI will use them.
  • Multiplayer: Play online with friends with full support for custom civilizations, saved multiplayer games, and much more.
  • A deep economy: Every world is unique with many different resources that can change the course of your strategy each game.
  • Planetary Governors: Utilize individual planetary leaders to govern your worlds, deciding what improvements to build and when, which leaves you to focus on larger strategic goals.

System Requirements

    • OS: 64-bit Windows 10 / 8.x / 7
    • Processor: 1.8 GHz Intel Core 2 Duo / AMD K10 Dual-Core
    • Memory: 4 GB RAM
    • Graphics: 512 MB DirectX 10.1 Video Card (AMD Radeon HD5x00 Series / Nvidia GeForce 500 Series / Intel HD 4000 or later)
    • DirectX: Version 10
    • Network: Broadband Internet connection
    • Storage: 12 GB available space
    • Sound Card: DirectX Compatible Sound Card
    • OS: 64-bit Windows 10 / 8.x / 7
    • Processor: 2.3 GHz Intel Core i5 Processor or Equivalent
    • Memory: 6 GB RAM
    • Graphics: 1 GB DirectX 10.1 Video Card
    • DirectX: Version 10
    • Network: Broadband Internet connection
    • Storage: 15 GB available space
    • Sound Card: DirectX Compatible Sound Card
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Mostly Positive (115 reviews)
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