The best Exploration Game alternative to Kerbal Space Program is Juno: New Origins, which is free. If that doesn't suit you, our users have ranked more than 10 alternatives to Kerbal Space Program and four of them are Exploration Games so hopefully you can find a suitable replacement. Other interesting Exploration Game alternatives to Kerbal Space Program are Spaceflight Simulator, Pioneer and Rocket Science.
Bring to life anything you can imagine from rockets and airplanes to cars and more. Automate them with a visual programming language. Explore 3D planets and download more from the community. Share your creations online.
In Spaceflight Simulator, you will get to build your rockets, plan launches and flights, attempt landings, deploy payloads and explore new worlds.
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...
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.
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Pioneer is not a game of simulation or building. It's more like Elite II, or Oolite.