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:
Very Positive (264 reviews) - 80% of the 264 user reviews in the last 30 days are positive.
Mostly Positive (4,923 reviews) - 78% of the 4,923 user reviews for this game are positive.
Release Date: May 14, 2015

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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.

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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

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Buy Galactic Civilizations III - Mercenaries Expansion Pack

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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

23 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:

21 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
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Very Positive (264 reviews)
Mostly Positive (4,923 reviews)
Recently Posted
militarized assault lizard
( 3.3 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

Helpful? Yes No Funny
( 83.2 hrs on record )
Posted: June 24
awesome!!! suck hours of my sleep
Helpful? Yes No Funny
Millhouse Manastorm
( 101.2 hrs on record )
Posted: June 24
After you start knocking out opponents the game dynamic becomes more and more predictable and repetetive. I didnt even want to finish my first win.
Multiplayer games are much too hard to start up or keep going past 10 minutes.
Helpful? Yes No Funny
( 48.5 hrs on record )
Posted: June 24
Always crashes, difficult to understand tech tree
Helpful? Yes No Funny
( 5.6 hrs on record )
Posted: June 24
Very poor balance.
Not a lot to do.
Helpful? Yes No Funny
( 6.9 hrs on record )
Posted: June 24
Product received for free
i have not been playing for very long since i just got the game yesterday during the sale. but so far i do like the game i even bought all the dlc, the only thing i dont like about it is one second you will be friend's with everyone then slowly for no reason they all declare. i also have not gotton the ship building part down yet turn 100 the most powerfull civ would have like 300 power and me only 40. but i still like it so if you want to get it get it while it's on sale.
Helpful? Yes No Funny
( 174.5 hrs on record )
Posted: June 24
Im very split between if I should advice anyone to buy this game or not.
Its one of those you might like or get very irritated by many of the small bugs and odd features it seems to lack.
Good news is at the time of writing this its still supported game but the downside is that the DLCs are expenssive for what you get back from it. A bundle on sale maybe is a good solution.

+The ship builder is decent and lets you create a lot of different ships in all shape and sizes.
+You can add as many races as you like and play in a huge galaxies. (played on the largest map with 43 AI and it works well).
+Tech tree lets you choose different traits in specialization

-Ships change name seemingly randomly when they are upgraded.
-When your ships are in a fleet and you want more info on it you have to take it out of the fleet to be able to view it.
-No good way to manage starbases besides micromanaging which takes most of your time.
If you use the ingame method it will basicly spam down your shipyards as it will build many constructors.
-Roles of the ships are defined with the design and can not be modified prior to combat, if you have armed support ships or if you would like to engage with your normal guardians this really sets you up for failure, as they will wait to engage until the ones up front are shot up first.
-After the AI turns you will not know if your ships saw any hostile ships inside their sensor range UNLESS you were looking at that spot of the map as the turn went and you didnt blink.
This is a huge drawback and has forced me to build huge sensor platforms to actually know whats going on.

Personal preferences
I personally would like to see the ships having different modifiers for weapons/defenses vs size,
This to better reflect the differences between them.
Also adding different docks inside the shipyard to create more ships at the same time.
The docks would be different sizes so when you can build a larger class of ships you would need to build a larger dock.
Smaller ships should be cheaper(as with their stats being lower).
I would like to see the option to build custom tiny fighters to be carried in carrier modules and that could operate to a certain area outside the carrier fleet as well. the modules should have increased capacity but unable to regenerage fighters.
Also when upgrading I feel that the way it works now is slightly ridiculous, I think that either there should be a rule that 75% of base parts have to be the same or preferably all modifications inside a shipyard.

I should have written more, but its late and Im sure nobody have read this far
Helpful? Yes No Funny
( 84.0 hrs on record )
Posted: June 24
Pretty disappointed with my purchase. I preordered, because I really liked the older GalCiv games. If I had got it on sale I might feel a bit differently, but I paid full price for what I expected to be a good game. It is an okay game. Just a bit shinier than the last. Nothing fundamentally different. Maybe even a bit worse because it seems to lack depth somehow. For example, the AI is pretty flawed. The enemy will trade away just about whatever strategic resources you can pay for. Want my survey ship on turn 3? np. What gets me, and why I will never buy another GalCiv game again is the nearly immediate release of $5 DLC content that just should be part of the game. This kind of grab for money with no real innovation is just crap that I cannot support. It is really terrible. It is such a good concept with a lot of potential that just isn’t reached. Overall value 3/10.
Helpful? Yes No Funny
( 18.6 hrs on record )
Posted: June 24
Unimpressive. It's the same old as the other games in the series, a few minor tweaks (race design) but nothing to write home to mum about. For me the biggest two problems with it are in order to have even a most basic overview of what is going on you have to zoom out - when you zoom out the display becomes a 2D hexagonal grid full of stylised symbols for ships, planets etc making the whole thing look like a 1980's table top strategy board game. The graphics are nice enough up close - when you are so close you literally can't do anything worthwhile.

The second problem is the ship designer - probably the games greatest asset. It is fiddly to use at best, the rotation dials are nightmarish and as far as I can tell you can't rotate the 3D model to get a good look at what it looks like from the front/top/side as it is permanently shown at a 45 degree perspective. I tried 4 basic ships and saved as templates, each saved but without any active modules (ie the entire hull configuration was there but missing the colony pod, same problem with constructor module etc).

Don't get me wrong, the game is ok - so was GCII with all its variants and this just seems to bring not much new to get excited about.

=) Hours later....sudden afterthought, this thing is moddable which I haven't explored so the community may save it contentwise.
Helpful? Yes No Funny
Project Gateway
( 33.1 hrs on record )
Posted: June 24
Next turn......Next turn......Next......Wait! Morning already?!

Screw work! I'm gonna finish the game!

...and next! Morning already?!

The only thing that bothers me is that the maps (especially huge, gigantic, and insane maps) consume too much memory.
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
18 of 26 people (69%) found this review helpful
2 people found this review funny
Not Recommended
358.4 hrs on record
Posted: June 5
Buy only if you like giving money away

The base game is bare and not finished, so they keep giving us dlc that adds stuff that should already be in the game. thats fine, alot of games do that but the dlc is over priced for the content they are giving us. They could easily put all the "dlc" in one big one and it should cost 25- 30 dollars and that is pushing it. With the price of all the dlc u could by a new game that is finished, and like a year from now you might be able to buy two new games with the price of their "dlc" because they still keep giving us more "dlc", why do people keep buying their sh*t. i like the game but it got boring fast and it became a money pit, so buy the game or dont, i dont care but i have warned you. MONEY PIT
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7 of 8 people (88%) found this review helpful
1 person found this review funny
121.4 hrs on record
Posted: June 14
Over 100 hours of gameplay stretched over months I've gone back and forth on whether I could recommend this game. I decided I can definitely recommend it because it's developers continue to improve it. Initially GC3 felt barren and boring so I put it aside. Each time I come back I find myself playing it more and more as it receives updates.
GC3 can be compared best to Civ V in my opinion. I love Civ 5 and have played it more than 400 hours. I can tell you Civ 5 is a complete game whereas GC3 is not. Civ 5 feels balanced and polished whereas GC3 is not. Yet I come back to GC3 because I love a space theme and there's no other Space Opera out there. Endless Space was okay, but GC3 has more to it. I'm certainly looking forward to Endless Space 2 and Stellaris (I know it's out but it needs probably a year of polishing and DLC).
+Races look and feel different, but I wouldn't call it night and day
+Customizations in terms of appearance
+Tech tree is good
+Building placement is fun
+Continual improvements by devs

-Ship models don't look as good as workshop models
-Some questionable balancing (building ships to move 30+ spaces, overlapping starbase bonuses on colonies)
-Still needs some polish
-Not enough music. Seems like only a few tracks of music.

A note on building ships. Why is it many space 4X games out there feel the need to let players completely customize ships? I feel this usually leads to broken designs and the AI just can't compete against players who know what weapons and defenses to stack and so on.
Anyways, it's said that next year GC3 is getting a major overhaul + expansion. Needless to say I'm looking forward to this very much.
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8 of 11 people (73%) found this review helpful
Not Recommended
66.3 hrs on record
Posted: June 21
I preordered this game, and I wish I hadn't. Returning players will find only disappointment; This game is less feature-complete than pre-expansion GalCiv 2 wass. Repetitive events, no espionage, single-minded AI. Even a year later, it's still plagued with bugs, glaring typos and art assets that seem like placeholders.

Stardock have kept their focus on milling out DLC after DLC over solving persistent issues. Some of these cash-in DLC are brazenly based on features which used to be GalCiv/GalCiv 2 gameplay staples. Go play Stellaris instead, or Endless Space.
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11 of 17 people (65%) found this review helpful
Not Recommended
456.1 hrs on record
Posted: June 15
50 games started and only 1 actually able to be finished. The rest crashed (or lock up, or become unplayable) long before endgame. They released it way too early, To me, they should still be calling this a Beta. And now, they release v1.8, the game is completely unplayable now.. as soon as I hit the TURN button, the game locks up on turn 1. The Devs are idiots, they fix a couple things and break a hundred others.
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6 of 8 people (75%) found this review helpful
1 person found this review funny
Not Recommended
120.5 hrs on record
Posted: June 18
While I've had some fun with it, I cannot in good faith recommend this game. There are many interesting systems and choices for the player, but there are an unacceptable amount of bugs/blatant mistakes in the game.

to give you some examples:
-The tech tree is poorly written, it is often difficult to understand what a given tech does.
-There are several typos in the tech tree. By typo I mean when an item or tech obviously has the wrong value.
-Races and ideologies are not balanced in the least.
-The player get to decide how the enemy will prioritize which ships to shoot first (no no that's not a battleship, it's an interceptor, I swear!)

Still, if you get it for 10€ and don't expect the pieces to fit together properly it can be good fun.
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4 of 5 people (80%) found this review helpful
95.2 hrs on record
Posted: June 12
Fans of previous galactic civilization games will find this game familiar. The game has a smoother and more refined look than its predecessors, but its control is similar. Start as a single planet, explore, colonize new planets, meet new races doing the same. Victory conditions include conquest/diplomacy/influence/science/ascendancy. The game has predesigned ships, but you can completely design your own (graphic as well as parts). Thousands of mods available. Galaxies are customizable in terms of size (tiny with dozens of stars to insane with ? thousands), variable amounts of races (2 to 100)/black holes/stars/good&bad planets/anomalies/pirates. Your own race can be one of the stock races or completely customizable. Also comes with a campaign mode, and other games can be played single player or multiplayer. Highly recommended!
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4 of 5 people (80%) found this review helpful
Not Recommended
53.0 hrs on record
Posted: May 26
Had repeated problems with the game crashing.

No editor unless you want to get a DLC, booooo!

Last time I'll buy into GalCiv, so sad.
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12 of 21 people (57%) found this review helpful
2 people found this review funny
Not Recommended
894.3 hrs on record
Posted: June 5
Gave up on it. Devs keep messing around with things so that game play became too complicated.
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2 of 2 people (100%) found this review helpful
33.1 hrs on record
Posted: June 24
Next turn......Next turn......Next......Wait! Morning already?!

Screw work! I'm gonna finish the game!

...and next! Morning already?!

The only thing that bothers me is that the maps (especially huge, gigantic, and insane maps) consume too much memory.
Was this review helpful? Yes No Funny
3 of 4 people (75%) found this review helpful
1 person found this review funny
Not Recommended
41.9 hrs on record
Posted: May 26
I like the game but its dificult to play when the enemy builds more powerful ships at a much faster rate than you can. Also there seems to be problems with windows 10 as the game keeps crashing and as of yet i havent found a solution. I have only had the game for about 1 week and i am hopeful that i can fix the problems with the game but i would not recomend it at this time !!!!
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