People and agencies in the space industry have taken an interest in the game, including NASA. Kerbal Space Program has support for user-created mods that add new features, and popular ones, such as those for resource mining and context-based missions, have received support and inclusion in the game by Squad. 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 bi-elliptic transfer orbits. In the game, players direct a nascent space program, staffed and crewed by green humanoid aliens known as 'Kerbals'. aaaaand I just saw the edit.Kerbal Space Program, commonly abbreviated as KSP, is a space flight simulation video game developed and published by Squad for Microsoft Windows, macOS, Linux, PlayStation 4, and Xbox One. And finally, ROBOTICS!™ with wich you can build more flexible rockets. You get surface objects that you can scan (for a lot of science, wich is very important, you'll see) You get surface stations (not those space ones, those are boring right now when talking about the surface ones) that when placed (by the appropriate kind of kerbonaut) will yeld you passive science (wich unfortunately cannot be exploited). objects? wait how are they called? 'objects' is good enough I guess. With the 'Breaking Ground' DLC, you get a new suit that glows (that's the most important thing). And add Moar Boosters™ wich are bigger :) And the new parts allow you to build much more interesting lookin' rockets, stations and bases. set dialouges, and upload/download missions to and from the workshop.

requirements, set checkpoints for orbits, landings, etc.

With the 'Making History', you can do what it says, you can make costum missions, with weight, item, resource, etc. (If you don't know how to play, I sugest Scott Manley's tutorials, even if they are in a much older version) (And the graphics have improved drastically, and all the planets and moons got a major texture revamp) (Now there are many, many more quality of life improvements) It's not, because not many people are even interested in 'space stuff', but the one that are, are enjoying the hell out of it (me included). KSP is one of the best games, even if it's not that popular.

Kerbal space program free space