Galactic Civilizations III is the largest strategy sandbox ever made. Start with a single world and expand across the galaxy through diplomacy, trade, cultural hegemony, or military conquest in this single-player or multiplayer 4X strategy game. How will you rule your galaxy?
User reviews:
Mostly Positive (212 reviews) - 71% of the 212 user reviews in the last 30 days are positive.
Mostly Positive (5,117 reviews) - 77% of the 5,117 user reviews for this game are positive.
Release Date: May 14, 2015

Sign in to add this item to your wishlist, follow it, or mark it as not interested

64-bit Windows Required

You must be running 64-bit Windows 7 or later to play Galactic Civilizations III. This requirement allows us to create the largest, most advanced, strategy game possible.

Buy Galactic Civilizations III

Packages that include this game

Buy Stardock Bundle 2016

Includes 8 items: Galactic Civilizations III, Sorcerer King, Sins of a Solar Empire®: Rebellion, Fallen Enchantress: Legendary Heroes, Dead Man's Draw, Galactic Civilizations® II: Ultimate Edition, Galactic Civilizations® I: Ultimate Edition, Demigod

Buy Galactic Civilizations III - Mercenaries Expansion Pack


Recent updates View all (56)

June 15

New Rise of the Terrans DLC Now Available

New "Rise of the Terrans" DLC is Now Available
“Humanity’s destiny is in the stars.” - Secretary General Mathews, United Earth Government

Experience the early days of the Terran Alliance and lead humanity's first steps out into the galaxy.
Destiny might be calling, but you are not alone and will soon discover that not every race is welcoming.
Your choices will guide your people's futures as you face down new and unexpected threats, build your empire, and explore the furthest corners of space.

New Prequel Story Campaign
Learn how the Terran Alliance was founded and what challenges humanity faced as they fought to form it.

Face Down New Threats
Encounter the Stellar Guild and the deadly Xendar Menace

Play as a New Faction
Enjoy the benefits of a new trait that boosts experience gained from ship battles with the United Earth faction, led by new leader Secretary Mathews

The new "Rise of the Terrans" DLC is now available on Steam or through Stardock.
For more information on Galactic Civilizations III, please visit

28 comments Read more

June 14

v1.8 Update with Asteroid Mining and More Now Available

Mine Asteroids, Level Ships, and Experience Improved Multiplayer in v1.8 of Galactic Civilizations III
New features, updates, and adjustments to the base game. For a full list, see the change log below!

Asteroid Mining
Looking for a get rich quick scheme? Well, this may not quite fit the bill, but it will fill your pockets! Choose an asteroid in your zone of control and build an Asteroid Mining Base. When completed, it will send raw production to a planet of your choice. make sure to keep an eye out for your enemies, though -- these bases are fragile and easily destroyed.

New Planet List
There are a lot of planets out there just waiting to be discovered! This new planet list allows you to keep track of the planets you've already found so that when you go back to colonize them later, they're much easier to find.

Ship Leveling
Win battles and survey anomalies to level up your vessels! Most ships will gain additional hit points as they gain experience and Mercenary Ships will improve based on their existing abilities, which makes them a lot more relevant in the late game.

Star Information Window
Click on a star to see all colonizable worlds within that system. Organize your empire by renaming stars with your own name scheme - or, draw inspiration from your favorite Sci-Fi series!

Multiplayer Improvements
Enjoy new stability in your games online with friends! The game has been updated to allow for increased ship movement during multiplayer matches and a host of fixes for issues that could cause desyncs.

If you've been playing Galactic Civilizations III, we want to hear from you! Join the conversation over at Steam.

For more information on v1.8, check out the change log here:

22 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

Never the same game twice, Galactic Civilizations III is the largest strategy sandbox ever made. 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.
  • Story-based campaign: Get brought up to date on the 20-year story arc behind the rise of humanity in the 23rd century.
  • 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: For the first time, Galactic Civilizations is a multiplayer game with full support for custom civilizations, saved multiplayer games, and much more.
  • New Battle System: Assign your ships specific roles to play in combat. You can now view fleet battles in a cinematic style to see your designs in action.
  • New Colony Manager: The location of a planetary improvement now matters. Adjacency bonuses and planetary resources make a major impact on what a planet is strong (or weak) at accomplishing.
  • 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
Customer reviews
Customer Review system updated! Learn more
Mostly Positive (212 reviews)
Mostly Positive (5,117 reviews)
Recently Posted
Grumpy, Skeptic Cat
( 70.2 hrs on record )
Posted: July 25
Oh... I have to type here. Well well. It's good. Gets a little laggy towards the end. Heard it even happens when you have a beefy computer. Ey. Stardock, stop asking me to review it so early. I haven't had a ♥♥♥♥ing chance to play it was. So lemme play and make another review.

Oh. Game is lovely by the way. Just... I don't get it when the Aliens seems to be so advanced and have a larger military. I am always having to Face them off all the time with a smaller military. On the plus side though... My military is 10x as advanced most of the time.
Helpful? Yes No Funny
( 48.0 hrs on record )
Posted: July 24
All around the game is good but there are a few problems with it. 1) The game likes to crash in multiplayer if there are too many moving ships even if all players were to stop theirs the cpus will crash it or cause the game to not start the next turn. 2) Non-aggro cpus become extremely militaristic over the slightist things, occasionally starting a war which leads to problem 1) or tries to eliminate the player early on or asap. 3) Multiplayer options are still not avaliable to use or are missing. I would rcommend it though only to a certian point.
Helpful? Yes No Funny
( 43.9 hrs on record )
Posted: July 24
the muliplayer connection sucks.. but the game is really fun till a connection (which is most of the time) is not optimal you or the host will dc screwing up the game in the process
Helpful? Yes No Funny
( 64.6 hrs on record )
Posted: July 24
i really enjoy the game it takes a bit to learn and understand (took me 2 full days to get to a respectable level of understanding so i couldnt be considered a straight up worthless newb) but once u do its a great turn based strategy game and one of my favourites i think it just needs a better training system for its newer players though (lol took me 2 days to figure out a decent ballance to my planets so they were actually usefull and i could actaully start to sustain a decent army)
Helpful? Yes No Funny
Cosh Holga
( 15.6 hrs on record )
Posted: July 24
I found myself getting board with this game very fast. Its an ok game but very slow and Ive had more fun playing other civ games. I got the game on sale to compair far im likeing that better. Over all its an ok game but a remake with nothing new and almost as many DLC as Train simulator games. I cant recommend this to anyone given the current state.
Helpful? Yes No Funny
( 119.9 hrs on record )
Posted: July 24
Graphics and ship design are much better then Gal Civ II but less weapon tech and different types of weapons (torpedoes look like missiles, etc) as compared to Gal Civ II.
Helpful? Yes No Funny
( 23.9 hrs on record )
Posted: July 23
Bought this game when in beta, always crash in game after awhile. Expecting fixes at full release but, instead, see DLC after DLC coming out asking for $5, $10, $15. Very disappointed with the way they make games nowadays.

Game play is alright until early mid-game when things get repetitive. They put new features into DLC before even getting the basic features right.

Do not buy this game.
Helpful? Yes No Funny
( 51.4 hrs on record )
Posted: July 23
it's Good!
Helpful? Yes No Funny
( 77.1 hrs on record )
Posted: July 22
i like the could be better. would buy 9/10.
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
50 of 60 people (83%) found this review helpful
7 people found this review funny
Not Recommended
35.3 hrs on record
Posted: June 25
Bought this game to play with friends, and multiplayer didn't work for a single one of us. Instant crash to desktop every time.

We all got our money back, so at least the one thing that worked was Steam Support.

10/10 crash experience, highly immersive


We have discovered the issue, it seems to be able to play with your friends they MUST have the same DLC as you. So if you intend to game with friends, be sure they have all the DLC that you do, otherwise you are wasting your money.
Was this review helpful? Yes No Funny
21 of 24 people (88%) found this review helpful
Not Recommended
285.3 hrs on record
Posted: June 28
I really love this game but is it at all possible for you guys to fix the crashing? i mean sometimes i wait 5 minutes before realizing the game will never catch up i understand the game is massive and even more so depending on the size of the map but when a small sized game can last 24+ hours i expect to be able to sit and play for at least 2 hours before the game completely ♥♥♥♥♥ itself and crashes. Also it would be really nice if you guys were a lot more honest about the ram demand because if you have yet to purchase this game and you run with even 16 gb of ram the game cant wait to crash. This game is definately worth the purchase what little i can actually play before it crashes. The crashes have become even worse now with even more ♥♥♥♥ to populate the screen. Can we focus on one thing at a time i do not think we really needed mining facilities on the dead rocks but who the hell cares lets continue to add more and more ♥♥♥♥ so the game will never work unless your sporting 64gb of ram. I cannot at this time recommend purchasing this game for in its current state it is infact unplayable.
Was this review helpful? Yes No Funny
13 of 14 people (93%) found this review helpful
2 people found this review funny
Not Recommended
9.1 hrs on record
Posted: July 3
As a big fan of Gal Civ I and II, I was excited for the third. This game is not like those. The originals were epic and complete strategy games with a charming miniamilst indie-style. Part 3 is actually a DLC purchase simulation game, where gameplay consists of buying and downloading tons of nickle-and-dime DLC, which trickles out every so often. The original game is so short and shallow, I thought I had completed the tutorial only to discover the campaign was over. This game was just a shell onto which endless DLC is piled. Features that were in the original games were removed from the third, and repackaged as DLC (with some features still missing). Stardock once held the title as "most trusted developer" in my book, but things have changed at the studio, and their products are absolutely awful rip-offs now, and Stardock should be considered a scam company. (See also, "Elemental" for another example of a rip-off game from these developers).
Was this review helpful? Yes No Funny
26 of 38 people (68%) found this review helpful
2 people found this review funny
Not Recommended
50.8 hrs on record
Posted: June 28
Well... I bougt the game because of that i loved Gal Civ 2.

Gal.Civ 3 is perfect if you love chrashes and repeating pointless stuff. And of course, insted of fixing the game they make DLC, lots of DLC.

Because of the abusing of DLC Stardoc is now on the black list togeather with Paradox.
Was this review helpful? Yes No Funny
12 of 13 people (92%) found this review helpful
Not Recommended
357.9 hrs on record
Posted: July 3
I'll preface this by saying I have purchased all of the GC games and like them all. The one thing that has become more obvious is the tendency towards releasing a very early, base game and using DLC to spice it up and make it seem more interesting. A "Season Pass" is the standard it seems now....

This game, even after a year of being out and having been patched all the way up to v1.8, still has major bugs and memory leak issues. Any of the larger maps are not able to be played to completion due to memory issues and performance lag. The machine I have has 16gb of memory and still has issues. One bug (destroy a planet) has been in the support forums since early 2015 and still hasn't been addressed. The keyboard shortcuts and game documentation leave much to be desired. Not enough shortcuts and too much repetitive "point/click" items.
Was this review helpful? Yes No Funny
9 of 9 people (100%) found this review helpful
Not Recommended
14.6 hrs on record
Posted: July 4
bought this game for 40 Euros and half of races are not playable, because i need to buy dlc?

Was this review helpful? Yes No Funny
8 of 9 people (89%) found this review helpful
Not Recommended
23.1 hrs on record
Posted: July 3
This is an amazing 4x space turn-based strategy with some depth and an AI that isn't asleep at the wheel. Unfortunatley I've finished 1/4th of the games I've started in single player and none of the multiplayer games.

I got this game for myself an my wife, we love the Civilization series and I had played previous Gal Civs before, we picked it up and got hooked. But then the game crashed, eh that happens no worries. But it keeps crashing, we've jumped through the various tech support hoops and its still unstable as the day we bought it.

Specific and unavoidable parts of the game seem to force the game to crash on a regular basis, like someone defying the U.P. Vote in multiplayer seems to always kill the game for myself and my wifes copy independently of each other. This, along witht he trouble shooting we tried, tells me the game is faulty.

tl;dr crash happy fun 4x game.
Was this review helpful? Yes No Funny
5 of 6 people (83%) found this review helpful
Not Recommended
505.1 hrs on record
Posted: July 2
This game is really addictive and fun, but buggy and unstable. I keep starting games and right as they get fun I have to abandon them because they keep crashing to desktop. Specific random events trigger this, one I pinpointed to a shipyard being destroyed, and I just encountered it again after wiping out the last Klingon planet. Often if a downloadable ship belonging to a different faction than the one you're playing is chosen, the game crashes too. And that's not counting the litany of weird little quarks, like having the starbases randomly revert to the oldest, worst kind of constructor ships when they "order" their upgrades.

I would love to recommend this game. It's a nice, quiet 4x afternoon with a lot of beautiful custom ships from the modding community, but it's just too buggy right now. Hopefully the product managers let the devs focus on stabilizing the game instead of trying to pump out more DLC for 5 bucks a pop.

Stabilize the game guys, then I'll buy the DLC, I promise. Until then, meh.
Was this review helpful? Yes No Funny
2 of 2 people (100%) found this review helpful
Not Recommended
165.7 hrs on record
Posted: July 10
Played many hours of GCII, but this one leaves a LOT to be desired. I know there are fanboys on here that swear this game is great and it's easy, and it's the greatest game ever made, but they are obviously cheating, or modifying the game files.
For the rest of us, it comes down to the AI having a HUGE advantage over the human player, even on easy. Resources, FoW, manufacturing, etc. You HAVE to research weapons, armor, sensors, and other military techs from the start, and you must produce ships every turn as soon as you can.
On easy turn 800 or so, the power indicator shows AI having 32000 and I have 2800. This is after researching all of the available weapons and armor tech and putting out over 100 ships. There is NO way a human player can do this - without cheating. It's imp[ossible to put out 32000 points of ships. Survey and sensors are the same way - the AI can and will move faster than you, and make a bee-line for you even though it shouldn't be able to catch you, or to see you. Don't waste the time on this game, unless you want to use cheat codes or modify the game files.
Was this review helpful? Yes No Funny
2 of 2 people (100%) found this review helpful
1 person found this review funny
Not Recommended
134.5 hrs on record
Posted: July 21
I like it, but it has alot of issues in its current state, I would like to see more free content/features out

Reasonable AI
Alot of customization is possible
Decent community content
Massive maps are truly massive

Gets sluggish even with 16GB RAM as the game goes on
DLC DLC DLC DLC...base game is just that, basic, pay to unlock features
Unstable, make sure you enable auto-save to be frequent, I've lost alot of progress in games
Unless you got a powerhouse machine, it seems biggest maps will bring your PC to a stop
Was this review helpful? Yes No Funny