IMHO.

Single-player games like GalactiWar - Empire Simulator

Below are 9 single-player Steam games similar to GalactiWar - Empire Simulator, 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 GalactiWar - Empire Simulator page.

Ranked picks

  1. 1
    Thveit — Steam game cover

    Thveit

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with GalactiWar - Empire Simulator.

    Thveit is a cozy Norse settlement builder where changing seasons, ancient beliefs, and folklore creatures shape the fate of your settlements. Guide your settlers, manage resources, and grow a thriving community as humans and mythical beings learn to live side by side.

    StrategyIndieSimulationSingle-playerSimilar games →
  2. 2
    Terra Invicta — Steam game cover

    Terra Invicta

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Simulation with GalactiWar - Empire Simulator.

    An alien invasion has fractured humanity into seven ideological factions each with a unique vision for the future. Lead your chosen faction to take control of Earth’s nations, expand across the Solar System, and battle enemy fleets in tactical combat.

    2026StrategySimulation39.99 USDDeck VerifiedSingle-playerSimilar games →
  3. 3
    Lord of Rigel — Steam game cover

    Lord of Rigel

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with GalactiWar - Empire Simulator.

    Lord of Rigel is a turn-based 4X space strategy game inspired by the classics. In a galaxy divided by two elder races, will you unite with other species or forge your own path? Navigate galactic politics and defeat threats using espionage, research, and military force. How will you shape the galaxy?

    2024StrategyIndieSimulation19.99 USDSingle-playerSimilar games →
  4. 4
    The End of History — Steam game cover

    The End of History

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with GalactiWar - Empire Simulator.

    A historical sandbox simulation where every NPC lives their own life. They don't wait for you—they ally, marry, betray, and die. Kingdoms rise and fall by someone's will. Sometimes you shape history, sometimes it sweeps you away—an observer of a once-in-a-lifetime story that only you can witness.

    2025IndieSimulationRPG28.00 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Cosmonautica — Steam game cover

    Cosmonautica

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with GalactiWar - Empire Simulator.

    Cosmonautica is a fresh take on space trading in a procedurally generated universe, paired with quirky humor for your intergalactic enjoyment.

    2015StrategyIndieAdventure9.99 USDSingle-playerSimilar games →
  6. 6
    Sid Meier's Civilization VII — Steam game cover

    Sid Meier's Civilization VII

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Simulation with GalactiWar - Empire Simulator.

    The award-winning strategy game franchise returns with a revolutionary new chapter. Sid Meier's Civilization® VII empowers you to build the greatest empire the world has ever known!

    2025StrategySimulation69.99 USDDeck VerifiedSingle-playerSimilar games →
  7. 7
    Imagine Earth — Steam game cover

    Imagine Earth

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with GalactiWar - Empire Simulator.

    Build your own global colonies on distant worlds. Manage energy and resource supplies and produce goods for space trade. Form economic and diplomatic alliances or take over competing corporations. Conduct research to protect your colonists from disasters and avoid a climate crisis.

    2021StrategyIndieSimulation24.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Rocket Science — Steam game cover

    Rocket Science

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Simulation with GalactiWar - Empire Simulator.

    Take part in a space program. Design spacecrafts and send them off to explore the vast expanses of space. Experience the real scale of the Solar system and the size of its celestial bodies.

    2020StrategySimulationEarly Access19.99 USDSingle-playerSimilar games →
  9. 9
    Guns, Blocks, and Steel — Steam game cover

    Guns, Blocks, and Steel

    Single-player alternative to GalactiWar - Empire Simulator — playable solo, no multiplayer required. Shares Indie with GalactiWar - Empire Simulator.

    A tactical multiplayer FPS created by a solo developer as a passion project. Featuring a fully destructible, block-based environment. Gather resources to produce weapons, ammo, and vehicles. Play multiplayer PVP/co-op or singleplayer with bots.

    2024ActionIndieFree To PlayFreeSingle-playerSimilar games →