Fly missions to other Planets and Moons.

The Vehicle Assembly Building and Space Plane Hangar allow players to build spacecraft using a large amount of parts and tools.

So strap yourself in, and get ready to try some Rocket Science! Each part has its own function and will affect the way a ship flies (or doesn't). At your disposal is a large collection of parts, which must be assembled to create a functional ship. In KSP, you must build a space-worthy craft, capable of flying its crew out into space, without killing them. Kerbal Space Program is a multi-genre game where the player creates his or her own space program. In most of them the player can perform Science! And in full Career mode, players make decisions about various administrative aspects of the Kerbal Space Program while juggling program resources such as funds and reputation, and unlocking parts. Players then launch and pilot them across terrestrial surfaces, through atmospheres, and - most of all - in orbital transfers between the celestial bodies of what is unofficially called the Kerbol System. In the editor, parts can be combined in many ways, resulting in craft possessing various operational capabilities. Play centers on building and piloting craft. KSP suggests various goals in the form of contracts, but the sandbox nature of the game allows players to set and attain their own goals in variously “Kerbal” ways (read: ridiculously impractical and/or catastrophe-prone). Their space program operates from the Kerbal Space Center (KSC) on the planet Kerbin, sending craft out into a scaled-down analogue of the real-life solar system (though with significant differences). Kerbal Space Program (commonly KSP) is a space flight simulator game in which the player directs a space program run by the Kerbals, a cartoonish race of little green humanoids.

Kerbal space program free online demo