Single-player games like Galactic Civilizations® II: Ultimate Edition
Below are 18 single-player Steam games similar to Galactic Civilizations® II: Ultimate Edition, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Galactic Civilizations® II: Ultimate Edition page.
Ranked picks
- 1
Galactic Civilizations® I: Ultimate Edition
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Civilizations® II: Ultimate Edition.
Galactic Civilizations is a space based strategy game in which you are in control of humanity's destiny.
- 2
Galactic Civilizations IV
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy with Galactic Civilizations® II: Ultimate Edition.
Take command of a civilization that has just achieved faster-than-light travel in Galactic Civilizations IV, the newest entry in the award-winning space 4X strategy game series. Explore the galaxy, colonize worlds, shape cultures, make alliances, fight wars and pioneer new technologies.
- 3
Galactic Civilizations III
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy with Galactic Civilizations® II: Ultimate Edition.
Build a civilization that will stand the test of time in the largest space-based strategy game ever! Choose from dozens of unique races and make a name for yourself across the galaxy through diplomacy, espionage, technological advances, and more.
- 4
Sins of a Solar Empire®: Rebellion
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Civilizations® II: Ultimate Edition.
Command a space-faring empire in Sins of a Solar Empire: Rebellion, the new stand-alone expansion that combines 4X depth with real-time strategy gameplay.
- 5
Sins of a Solar Empire: Trinity®
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Civilizations® II: Ultimate Edition.
In Sins of a Solar Empire: Trinity, you are the leader of a civilization embroiled in a galactic war, fighting for the survival of your entire race against relentless foes.
- 6
ENDLESS™ Space - Definitive Edition
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy with Galactic Civilizations® II: Ultimate Edition.
ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the ENDLESS™ Universe, where you can control every aspect of your civilization as you strive for galactic domination.
- 7
Stellar Monarch
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Civilizations® II: Ultimate Edition.
Asymmetric space empire builder where you feel like the Emperor, not a logistics officer. No micromanagement, grand scale, fast paced, audiences, assassins, imperial court, disloyal admirals.
- 8
Halcyon 6: Starbase Commander (LIGHTSPEED EDITION)
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Civilizations® II: Ultimate Edition.
A retro space strategy RPG with base building, deep tactical combat, crew management and emergent storytelling. Halcyon 6: Lightspeed Edition is a massively enhanced version of the Award Winning indie strategy RPG, Halcyon 6.
- 9
Stellaris
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy with Galactic Civilizations® II: Ultimate Edition.
Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities.
- 10
PARADOX
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Indie with Galactic Civilizations® II: Ultimate Edition.
PARADOX is a puzzle-platformer about time traveling and avoiding paradoxes.
- 11
Tiny Civilization
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy with Galactic Civilizations® II: Ultimate Edition.
This is a historical simulation game that promotes the development of civilization based on the match-3 Game. You'll need to gather resources, use skills, discover new technology, and lead humanbeing through a 10,000-year journey to the cosmos.
- 12
The Elder Scrolls IV: Oblivion Remastered
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required.
Explore Cyrodiil like never before with stunning new visuals and refined gameplay in The Elder Scrolls IV: Oblivion™ Remastered.
- 13
Oblivion
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Indie with Galactic Civilizations® II: Ultimate Edition.
Oblivion is a short, story-driven first-person horror game. Uncover the truth hidden within an abandoned school — but beware, some memories were never meant to return.
- 14
Sins of a Solar Empire II
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy with Galactic Civilizations® II: Ultimate Edition.
Battle for galactic dominance in this real-time 4X strategy game with unrivaled scale! You’ll explore, expand, exploit, and exterminate through military force, diplomacy, trade, culture, influence, and other underhanded tactics.
- 15
Ashes of the Singularity: Escalation
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy with Galactic Civilizations® II: Ultimate Edition.
A massive-scale real-time strategy game where you command entire armies on a dynamic battlefield. Conquer multiple worlds across several single-player campaigns; or play with your friends in multiplayer combat.
- 16
Star Control®: Origins
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required.
Star Control is a space role-playing game in which you command Earth's first interstellar starship on a mission to save the Earth from hostile alien empires.
- 17
Fallen Enchantress: Legendary Heroes
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Civilizations® II: Ultimate Edition.
Fallen Enchantress is 4X strategy game from the makers of Sins of a Solar Empire and Galactic Civilizations. Build a civilization in the magical world of Elemental. Recruit heroes, train armies, build cities, forge alliances and save the world in this rich world where it's never the same game twice.
- 18
The Political Machine 2020
Single-player alternative to Galactic Civilizations® II: Ultimate Edition — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Civilizations® II: Ultimate Edition.
Win the hearts and minds of America’s voters and take the 2020 presidential election by storm in Stardock’s popular political strategy game. Choose a candidate and run against a computer opponent or a candidate controlled by another person over the Internet.