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Free Kerbal Space Program Alternatives

The best free alternative to Kerbal Space Program is Orbiter, which is also Open Source. If that doesn't suit you, our users have ranked seven alternatives to Kerbal Space Program and three of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Kerbal Space Program are Pioneer and Pioneer Scout Plus.

Kerbal Space Program alternatives are mainly Puzzle Games but may also be Sandbox Games or Open World Games. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Kerbal Space Program.
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Kerbal Space Program is a multi-genre game where the players create their own space program.

Learn more about Kerbal Space Program

  1. Orbiter icon

    Orbiter

    • FreeOpen Source
    • Windows

    Orbiter is a realistic 3D real-time space flight simulator program.

    Screenshot
    Orbiter vs Kerbal Space Program opinions
    Most users think Orbiter is a great alternative to Kerbal Space Program.
    guiltypixel

    In no way is orbiter a KSP clone... it's a realistic simulator in continuous development for 21 years and counting. Orbiter is a flight simulator, not a game. When KSP just doesn't satisfy you anymore and you can calculate Hohmann transfers in your head, try this.

    Positive comment ago
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    0

    looks like it i think it's a clone

    Positive comment ago
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    -4
  2. Pioneer icon

    Pioneer

    • FreeOpen Source
    • Windows
    • Linux

    Pioneer is a space adventure game set in the Milky Way galaxy at the turn of the 31st century. The game is open-ended, and you are free to explore the millions of star systems in the game.

    Mars and Phobos (no shaders)
    Pioneer vs Kerbal Space Program opinions
    Some users think Pioneer is a great alternative to Kerbal Space Program, some don't.

    Pioneer is not a game of simulation or building. It's more like Elite II, or Oolite.

    Negative comment ago
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    2


  3. Pioneer Scout Plus

    • FreeOpen Source
    • Windows
    • Linux

    Pioneer Scout Plus download. Pioneer Scout Plus 2015-06-01 18:01:33 free download. Pioneer Scout Plus A game of missions, trade and space combat

    Screenshot
Showing 3 of 3 alternatives