We strongly recommend that you buy the game so you can support the developershttps://store.steampowered.com/app/220200/Kerbal_Space_Program/
WHAT IS KERBAL SPACE PROGRAM
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics. Launch your Kerbal crew into orbit and beyond (while keeping them alive) to explore moons and planets in the Kerbol solar system, constructing bases and space stations to expand the reach of your expedition.
HOW DO I INSTALL KERBAL SPACE PROGRAM ?
1. Click the green UploadHub button and you should be redirected to the Download.
2. Once KERBAL SPACE PROGRAM is finished downloading, extract the .rar file. (You will need WinRar, you can get it here
3. Once its extracted, go into the games folder and right click the game and run it as administrator and Enjoy!