Single-player games like Space Empires III
Below are 16 single-player Steam games similar to Space Empires III, 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 Space Empires III page.
Ranked picks
- 1
Space Empires II
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
Explore the galaxy, discover and colonize new planets to acquire enough resources. Design your ships, choosing from different hulls, weapons, shields, and several devices. Once you advance with technologies, new systems will be available, and you will have to update your designs.
- 2
Space Empires I
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
Space Empires I is the first chapter of the Space Empires series. A classic galactic conquest and turn-based strategy video game where you are the leader of a race of intelligent beings building large spaceships for interplanetary and interstellar travel through warp points between star systems.
- 3
Horizon
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
Horizon is a turn-based space strategy game of galactic exploration and conquest in which you are in control of humanity’s destiny. You will explore deep space, find new frontiers and discover alien artifacts hidden on long-abandoned planets.
- 4
Sid Meier's Civilization®: Beyond Earth™
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
Sid Meier’s Civilization: Beyond Earth is a new science-fiction-themed entry into the award winning Civilization series. As part of an expedition sent to find a home beyond Earth, lead your people into a new frontier, explore and colonize an alien planet and create a new civilization in space.
- 5
Age of Wonders: Planetfall
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
Age of Wonders: Planetfall is the new strategy game from Triumph Studios, creators of the critically acclaimed Age of Wonders series, bringing all the exciting tactical turn-based combat and in-depth empire building of its predecessors to space in an all-new, sci-fi setting.
- 6
Xenonauts
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
Xenonauts is a strategy game in which you control a multi-national military organisation defending a Cold War-era Earth from alien invasion, using small squads of persistent soldiers to eliminate the extraterrestrials and recover their technology in turn-based ground combat.
- 7
Galactic Civilizations® II: Ultimate Edition
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
Get the complete GalCiv II saga including Galactic Civilizations II: Dread Lords, the expansion pack Dark Avatar, and the newest expansion pack Twilight of the Arnor!
- 8
The Last Federation
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
From the creators of AI War: Fleet Command comes an all-new grand strategy title with turn-based tactical combat, set in a deep simulation of an entire solar system and its billions of inhabitants. You are the last of a murdered race, determined to unify or destroy the 8 others.
- 9
Master of Orion
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
The ascendant spacefaring 4X strategy game returns! A new chapter in the epic Master of Orion saga is poised to once again capture the imaginations of millions of gamers.
- 10
Stellaris
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
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.
- 11
Sins of a Solar Empire II
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
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.
- 12
ENDLESS™ Space 2
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
ENDLESS™ Space 2 is a Strategic Space Opera, featuring the compelling “just one more turn” gameplay, set in the mysterious ENDLESS™ Universe. As the leader of your civilization, will you impose your vision and build the greatest stellar empire?
- 13
Space Empires IV Deluxe
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
The award-winning Space Empires IV Deluxe is the latest edition in the Space Empires series. A grand strategy title in the space 4X (explore, expand, exploit, and exterminate) genre, Space Empires has already found a place in the heart of strategy gamers everywhere.
- 14
Galactic Civilizations IV
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
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.
- 15
Space Empires V
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
Space Empires V is the latest edition in the Space Empires series. This new chapter completely updates the UI and takes the player into a real-time rendered 3D universe. Watch space battles played out in glorious detail and realistic effects. Expand, Explore, Exploit, and Exterminate in a huge living breathing galaxy.
- 16
Space Empires: Starfury
Single-player alternative to Space Empires III — playable solo, no multiplayer required. Shares Strategy with Space Empires III.
In Space Empires: Starfury you are on a wild intergalactic ride through the Space Empires universe. You are an undercover agent for the TCN (Terran Confederation Navy) trying to determine the cause of a recent escalation of pirate attacks in the Neutral territories.