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!
Recent Reviews:
Mixed (55) - 69% of the 55 user reviews in the last 30 days are positive.
All Reviews:
Mostly Positive (5,469) - 76% of the 5,469 user reviews for this game are positive.
Release Date:
May 14, 2015

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Recent updates View all (83)

September 12

Enormous v2.5 Update for Galactic Civilizations III and Crusade Expansion Releases Today

Enjoy Vast Improvements with this Major Engine Update for Galactic Civilizations III and Crusade!

For a detailed list of updates, view the changelog at the bottom of this post and check out the two part dev journals (Part 1 and Part 2) from CEO Brad Wardell.

Major engine update to the base game and Crusade expansion

Improved UI
The AI is now stronger, better, smarter, faster! It is now especially adept at fleet building and management.

Better Game Balance
Player feedback is the cornerstone of many of our updates. In an effort to continue to make the game more fun, we've re-balanced how population works, adjusted the costs of improvements, improved some ship components, and more.

Faster Turn Times
For players who love enormous maps with lots of action, the sheer amount of ships on the screen and in the game could cause some major wait-time on turns. We've made adjustments so that the turn times are faster, even when the galaxy is crowded with lots of ships.

Increased Performance
As we continue to work on our engine, frame rate and memory useage should improve. We want to make sure that the game runs smoothly for everyone and have made lots of efforts toward that.

Featured updates to the base game

UI Adjustments
To make the game easier to navigate, Crusade's summary tab has been added on the right (but sorry, you still don't get citizens!). The tech tree, planet screens, ship screens, and govern screens have been adjusted for a better experience as well. To top it all off, we've added the "word on the street" feature from Crusade so that you can keep tabs on how your people are feeling!

Performance Enhancements
Something that doesn't show well in screen captures is performance. We moved over the AI system in the base game to a core-neutral engine, like what we've done with Crusade.

Economic Changes
Galactic resources now accumulate in the base game, just like they do in Crusade! We think this makes for a better experience overall.

AI Improvements
We've done a lot to the AI in order to improve it for the base game. The most noteable change is the Diplomacy system - we've ported over what's in Crusade to help the AI factions make more informed decisions about trade offers. We've also included the trade bar! In addition, trades, planetary management, and other AI improvements that we made in Crusade have been ported over into the base game.

New UI

Updated Economic System

Improved AI Fleet Management

Additional screenshots:
Updated Diplomacy System
Improved Map Generator

Don't have Galactic Civilizations III? Get it now on Steam or at Stardock.

Owners, the v2.5 update is ready and waiting for you in your Steam client. If you haven't already joined the Crusade, the expansion is available on Steam or at Stardock. |

See the full changelog on the Steam forums here.
38 comments Read more

June 19

v2.3 Updates the New Crusade Expansion and Base Game, Galactic Civilizations III

Enjoy AI improvements, new missions and more in Crusade and check out the AI adjustments and bug fixes in the base game!

Players who don't own Crusade yet can still experience smarter AI opponents, improved diplomacy, and more!

For a detailed list of updates, view the changelog at the bottom of this post.

Crusade Expansion-Only Updates:

New Content
More missions, more money (and probably more problems). The new missions will let you further explore the galaxy in search of wonders and resources to build up your civilization. The new "Mogul" promotion for your entrepreneurial citizens will net you 5000bc when you reach it. Score!

Game Balance
Many adjustments to the game's balance through changes to missions, bonuses, ideology, and more also feed into the improved AI.

AI Improvements
The AI is substantially better at managing domestic affairs (improvements, economy, etc.), as well as issues abroad (waging war, exploration, etc.).

Base Game, Galactic Civilizations III Updates:
  • Diplomacy: The AI is much better at bargaining with players and makes more intelligent trade offers.
  • Balance: A balance pass on planetary improvements now gives them an increased effect on gameplay, though it has also made them more expensive. Adjustments have also been made to the cost of specialty vessels such as constructors or colony ships.
    Galaxy Setup: More anomalies are available to explore early on in the game than there were before. The number of planets, stars, and habitable planets have also been substantially increased.
  • Performance: Some of the optimizations for Crusade have been ported over to create faster turn times and improve the general framerate.
  • AI: The AI has been improved to be able to play more intelligently, especially during times of war.
The v2.3 update is ready and waiting for you in your Steam client! If you haven't already joined the Crusade, the expansion is available on Steam or at Stardock.

Ludicrous sized map
That's a lot of planets. If you want to conquer them all, you'll have to...plan it.
Word on the Street
Planet overcrowding? Time to expand!
Being Watched
They've got their eye on you. |

See the full changelog here:
31 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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