IMHO.

Single-player games like Planet Colonization

Below are 8 single-player Steam games similar to Planet Colonization, 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 Planet Colonization page.

Ranked picks

  1. 1
    Advisors at the End of the Universe — Steam game cover

    Advisors at the End of the Universe

    Single-player alternative to Planet Colonization — playable solo, no multiplayer required. Shares Strategy with Planet Colonization.

    AEU is a fast paced realtime strategy and 4x hybrid. Players influence their empire to grow, fight, forge alliances or engage in trade. Players are given control over the empire's traits, research and a set of three types of abilities(Construction, Plagues and Agents) to accomplish their goals.

    2023StrategyIndie4.99 USDSingle-playerSimilar games →
  2. 2
    Europa Universalis IV — Steam game cover

    Europa Universalis IV

    Single-player alternative to Planet Colonization — playable solo, no multiplayer required. Shares Strategy with Planet Colonization.

    Rule your land and dominate the world with unparalleled freedom, depth and historical accuracy. Write a new history of the world and build an empire for the ages.

    2013StrategySimulation4.99 USDSingle-playerSimilar games →
  3. 3
    Terra Invicta — Steam game cover

    Terra Invicta

    Single-player alternative to Planet Colonization — playable solo, no multiplayer required. Shares Strategy with Planet Colonization.

    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 →
  4. 4
    Stellaris — Steam game cover

    Stellaris

    Single-player alternative to Planet Colonization — playable solo, no multiplayer required. Shares Strategy with Planet Colonization.

    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.

    2016StrategySimulation9.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    NEBULOUS: Fleet Command — Steam game cover

    NEBULOUS: Fleet Command

    Single-player alternative to Planet Colonization — playable solo, no multiplayer required. Shares Strategy and Early Access with Planet Colonization.

    Take command of your hand-tailored fleet of space warships and use realistic radar, electronic warfare, advanced movement controls in 3D space, and precision targeting to outmaneuver and outwit your opponents in a simulation-heavy tactical space game like no other.

    2022StrategySimulationEarly Access29.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    House of Legacy — Steam game cover

    House of Legacy

    Single-player alternative to Planet Colonization — playable solo, no multiplayer required. Shares Strategy with Planet Colonization.

    Step into the shoes of a fallen clan leader, starting with nothing but a crumbling estate and a handful of hopes, rising through careful planning, trade, and diplomacy to become one of the most powerful families in the land. Now it’s time to forge a legendary dynasty that leaves its mark on history.

    2025StrategyAdventureSimulation14.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    East India Company — Steam game cover

    East India Company

    Single-player alternative to Planet Colonization — playable solo, no multiplayer required. Shares Strategy with Planet Colonization.

    Trade exotic goods, command fleets, and dominate 17th-century seas. This blend of real-time strategy and naval warfare lets you build a trading empire across Europe and Asia. Strategize trade routes, engage in epic naval battles, and expand your influence to become the ultimate maritime force.

    2009Strategy9.99 USDSingle-playerSimilar games →
  8. 8
    Realpolitiks 3: Earth and Beyond — Steam game cover

    Realpolitiks 3: Earth and Beyond

    Single-player alternative to Planet Colonization — playable solo, no multiplayer required. Shares Strategy with Planet Colonization.

    Prove your political brilliance in a grand strategy like no other: pick any contemporary country, set up your government and navigate the pitfalls of domestic and international politics. A glorious destiny awaits - the domination of not just the Earth, but the whole Solar system!

    2025StrategyIndieSimulation24.99 USDDeck PlayableSingle-playerSimilar games →