Single-player games like Imperium Galactica
Below are 19 single-player Steam games similar to Imperium Galactica, 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 Imperium Galactica page.
Ranked picks
- 1
Imperium Galactica II
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
Reintroducing a classic from the golden era of gaming, the original empire building space RTS, Imperium Galactica 2 is back and looking better than ever with new high-res textures and vivid colors.
- 2
Master of Orion 2
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
Forge an empire in a universe where population growth is stripping away planetary resources. Colonize unknown planets and trade with other races for their knowledge.
- 3
Galactic Civilizations III
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
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
AI War: Fleet Command
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
"You are outgunned. You are massively outnumbered. You must win." These are your orders. Humanity has already fought its war against the machines -- and lost. AI death squads stand watch over every planet and every wormhole, the few remaining human settlements are held captive in orbiting bubbles, and the AIs have turned their...
- 5
Master of Orion 1
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
Forge an empire in a universe where population growth is stripping away planetary resources. Colonize unknown planets and trade with other races for their knowledge.
- 6
Starpoint Gemini Warlords
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
Strategy from the front lines! Starpoint Gemini Warlords combines 3rd person capital spaceship combat with 4X strategy and RPG gameplay elements. Build mighty war fleets and send them into battle or lead them into combat yourself. Become the Warlord and conquer the Gemini system!
- 7
Battlestar Galactica Deadlock
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
In Battlestar Galactica Deadlock™ you’ll take command of the Colonial Fleet in defense of the Twelve Colonies during the First Cylon War. Lead many different types of ships in this 3D tactical game. Every decision counts, your strategy will be vital – can you ensure mankind’s survival?
- 8
ENDLESS™ Space - Definitive Edition
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
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.
- 9
Master of Orion
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
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
Nexus - The Jupiter Incident
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
Ambitious megacorporations monopolize the conquest of space and the colonization of the solar system. At the very edge of the solar system, the companies make a discovery that will shift the technological advantage and upset the balance. And so a new conflict is born: "The Jupiter Incident."
- 11
Haegemonia: Legions of Iron
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
From the makers of the award-winning Imperium Galactica 1 and 2 games, discover a powerful space-opera like RTS game.
- 12
Command & Conquer™ Remastered Collection
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
Command & Conquer and Red Alert are both remastered in 4K by the former Westwood Studios team members. Includes all 3 expansions, rebuilt multiplayer, a modernized UI, Map Editor, bonus footage gallery, and over 7 hours of remastered music.
- 13
Dune Sea
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required.
Fly. Honk. Explore. Dune Sea is a side-scrolling adventure Goose game that lets you fly like a bird.
- 14
SimCity™ 4 Deluxe Edition
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
SimCity 4 Deluxe Edition includes the bestselling SimCity 4 and the all-new SimCity 4 Rush Hour Expansion Pack. Create the most massive region of cities ever, with a farming town, bedroom community, high-tech commercial center, and industrial backbone.
- 15
SkyDrift
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required.
Get closer than ever before to the world of adrenaline pumping sky-racing where flyboys can test and master their flying and combat skills against the deadliest opponents! Admire amazingly detailed terrains. Unlock state-of-the-art planes and personalize them with unique racing skins.
- 16
Sine Mora
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required.
Sine Mora is a horizontal shoot'em up that provides a unique take on challenge, where time is the ultimate factor.
- 17
Sine Mora EX
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required.
Sine Mora EX is a side-scrolling shoot'em up that provides a unique challenge, where time is the ultimate factor. Mixing classic shooter sensibilities with contemporary presentation, Sine Mora EX is a gorgeous shoot'em up offering both a Story Mode that weaves an excessive tale and an Arcade Mode.
- 18
Haegemonia: The Solon Heritage
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required. Shares Strategy with Imperium Galactica.
A stand-alone expansion pack to Legions of Iron, discover new innovations and even more stunning visuals that launch the Haegemonia experience into light speed.
- 19
Skydrift Infinity
Single-player alternative to Imperium Galactica — playable solo, no multiplayer required.
Skydrift Infinity is an action-packed arcade game focusing on the experience of flying alone, and with others, in a light, quick, fast-paced style.