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?
Core Features:
Never the same game twice: Play in the ultimate sandbox where each game has a unique map, unique worlds and new challenges to face.
Multiple paths to victory: Win through military conquest, cultural domination, technological ascension or political alliance.
Story-based campaign: Galactic Civilizations III includes a campaign that brings players 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. Player choices determine the capabilities of their civilization.
Custom ship design: Players have total control over how their starships function as well as how they look. Any ship you’ve ever imagined can be created or downloaded.
New to Galactic Civilizations III:
Massive scale: The new, 64-bit, multi-core engine increases the number of possible opponents from 16 to 128 with a similar explosion in maximum map sizes.
Ideology: Player actions advance their empires down the path of various ideologies, which unlock unique abilities, planetary improvements, and other bonuses.
Multiplayer: For the first time, Galactic Civilizations is a multiplayer game with full support for custom civilizations, saved multiplayer games and much more.
Unique technology trees: Players can play as any of the eight major galactic powers (or design their own), each with their own unique technology tree, ships, colony improvements and abilities.
Faction Creator: To encourage massive gameplay, the game includes a faction creator that allows players to create a civilization with its own look, ships, technologies and even options for how the AI will use them.
New Battle System: Players assign their 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.
Graphics: 512 MB DirectX 10.1 Video Card (AMD Radeon HD5x00 Series / Nvidia GeForce 500 Series / Intel HD 4000 or later)
Storage: 12 GB available space
Directx: Version 10
Network: Broadband Internet connection
Sound card: DirectX Compatible Sound Card
windows Recommended
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
Storage: 15 GB available space
Directx: Version 10
Network: Broadband Internet connection
Sound card: DirectX Compatible Sound Card
To activate the game, you need a Steam Account
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2025-10-29
Haunted by Boredom? It’s Trick-or-Treating Time Again!
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Take an Early Bite Before the Real Halloween Fright
It is almost time for the scary season again and we have prepared a really interesting promo for its peak, but how about a pre-event Halloween treat campaign as well? We thought you would enjoy that very much, so we decided to let you order goodies in the scarier genres (but not only) at exceptional discount offers and 50 lucky winners would get an incredible extra layer of sprinkles on top of it all…
This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
This game does not default to external Bluetooth/USB controllers on Deck, and may require manually switching the active controller via the Quick Access Menu
All functionality is accessible when using the default controller configuration
In-game interface text is legible on Steam Deck
This game's default graphics configuration performs well on Steam Deck