Free Kerbal Space Program AlternativesTop Simulation Games and other similar apps like Kerbal Space Program

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 five 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.

More about Kerbal Space Program
Copy a direct link to this comment to your clipboard
Kerbal Space Program alternatives page was last updated

Alternatives list

  1. Orbiter icon

    Orbiter

     7 likes

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

    Fed up with space games that insult your intelligence and violate every law of physics? Orbiter is a simulator that gives you an idea what space flight really feels like - today and in the not so distant future.

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Windows
    Orbiter screenshot 1
     
    |
    2
    28
    Comments about Orbiter as an Alternative to Kerbal Space Program
    guiltypixel
    Positive
    0

    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.

    Guest
    Positive
    -4

    looks like it i think it's a clone

    Review by a new / low-activity user.
    Kerbal Space Program Icon
    Orbiter icon

    • Most users think Orbiter is a great Kerbal Space Program alternative.

    • Orbiter is the most popular Windows alternative to Kerbal Space Program.

    • Orbiter is the most popular Open Source & free alternative to Kerbal Space Program.

    • Orbiter is Free and Open SourceKerbal Space Program is Paid and Proprietary
  2. Pioneer icon

    Pioneer

     12 likes

    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. You can land on planets, slingshot past gas giants, and burn yourself to a crisp flying...

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Windows
    • Linux
    Mars and Phobos (no shaders)
     
    |
    1
    6
    Comments about Pioneer as an Alternative to Kerbal Space Program
    Guest
    Negative
    2

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

    Review by a new / low-activity user.
    Kerbal Space Program Icon
    Pioneer icon

    • Some users think Pioneer is a great Kerbal Space Program alternative, some don't.

    • Pioneer is Free and Open SourceKerbal Space Program is Paid and Proprietary

  4. Pioneer Scout Plus

     2 likes

    A game of missions, trade and space combat in the 31st century using the Pioneer Space Sim engine with many additions and improvements.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Windows
    • Linux
    Pioneer Scout Plus screenshot 1
     
3 of 3 Kerbal Space Program alternatives