IMHO.

Single-player games like Unnamed Space Idle

Below are 10 single-player Steam games similar to Unnamed Space Idle, 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 Unnamed Space Idle page.

Ranked picks

  1. 1
    Idle Factory — Steam game cover

    Idle Factory

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Casual with Unnamed Space Idle.

    Idle can also build your industrial empire.

    2022IndieSimulationCasual4.99 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    Androsystem Idle — Steam game cover

    Androsystem Idle

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Casual with Unnamed Space Idle.

    Produce Androids and create a Fleet that will help you conquer new planets. Mine valuable minerals that will further increase your production capacity.

    2024IndieSimulationCasual1.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    Revolution Idle — Steam game cover

    Revolution Idle

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Free To Play with Unnamed Space Idle.

    Join an experience where each revolution takes you further into the unknown! Revolution Idle challenges you to multiply your accumulators to reach unimaginable heights. Will you manage to reach infinity?

    2025IndieSimulationFree To PlayFreeDeck PlayableSingle-playerSimilar games →
  4. 4
    Odyssée Stellaire — Steam game cover

    Odyssée Stellaire

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Casual with Unnamed Space Idle.

    Board your ship and push the boundaries of space exploration in this contemplative space incremental. Gather resources, develop your technology, and travel from the Moon to the edge of the solar system to answer a mysterious signal from the stars.

    2026IndieSimulationCasualSingle-playerSimilar games →
  5. 5
    Star Clicker Odyssey — Steam game cover

    Star Clicker Odyssey

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Casual with Unnamed Space Idle.

    Fight off a galactic threat in this idle clicker game. Battle waves of enemy ships, progress actively or passively, and save humanity. With over 200 high-quality ship models and background mode, watch your fleet soar across your desktop while you work!

    2025StrategyIndieSimulation4.99 USDSingle-playerSimilar games →
  6. 6
    BudMageddon — Steam game cover

    BudMageddon

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Casual with Unnamed Space Idle.

    Aliens Demanded 3 Billion KGs of Sticky Icky Buds Or They Vaporize The Earth! Humanity's last hope is You & weed. A chill pixel-art idle Incremental grower that runs while you do everything else.

    2026IndieSimulationCasualSingle-playerSimilar games →
  7. 7
    The Last Factory — Steam game cover

    The Last Factory

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Early Access with Unnamed Space Idle.

    Build, automate, and defend humanity's last factory on a dying industrial planet. Chain production lines, survive AUTON raids and dust storms, research lost technology, and uncover what silenced every factory before yours.

    2026StrategyIndieSimulationSingle-playerSimilar games →
  8. 8
    Astrodle — Steam game cover

    Astrodle

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Casual with Unnamed Space Idle.

    Ready for some chill time in space? Astrodle has you covered. Watch the numbers soar as you upgrade your ship and travel the stars. Oh, and you might just become a god.

    2024IndieCasual5.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    Factorio — Steam game cover

    Factorio

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Casual with Unnamed Space Idle.

    Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you.

    2020StrategyIndieSimulation35.00 USDDeck VerifiedSingle-playerSimilar games →
  10. 10
    Cookie Clicker — Steam game cover

    Cookie Clicker

    Single-player alternative to Unnamed Space Idle — playable solo, no multiplayer required. Shares Simulation and Casual with Unnamed Space Idle.

    An idle game about making cookies! Originally released in 2013 on the web, and actively developed since then. This is the official version for Steam.

    2021StrategyIndieSimulation4.99 USDDeck PlayableSingle-playerSimilar games →