The game has garnered commendation from spaceflight industry figures such as NASA, ESA, science communicator Scott Manley, ULA CEO Tory Bruno, SpaceX CEO Elon Musk, and Rocket Lab CEO Peter Beck. Popular mods have received support and inclusion in the game by Squad. Kerbal Space Program has support for user-created mods that add new features. The game was released out of beta on 27 April 2015. The first public version was released digitally on Squad's Kerbal Space Program storefront on 24 June 2011, and joined Steam's early access program on 20 March 2013.

The game features a realistic orbital physics engine, allowing for various real-life orbital maneuvers such as Hohmann transfer orbits and orbital rendezvous.

In the game, players direct a nascent space program, staffed and crewed by green humanoid aliens known as 'Kerbals'. Kerbal Space Program ( KSP) is a space flight simulation video game developed by Mexican studio Squad for Linux, OS X, Windows, PlayStation 4, PlayStation 5, Xbox Series X/S and Xbox One.

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