"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."

"Expand your Kerbal experience like never before with Kerbal Space Program: Making History Expansion. The first expansion pack for the critically acclaimed space simulation game adds new content to Kerbal Space Program, including an immersive Mission Builder, a History Pack featuring missions..."

"Kerbal Space Program: Breaking Ground Expansion is the second expansion for the PC version of the critically acclaimed space flight simulator, Kerbal Space Program. This feature-rich expansion is focused on increasing the objective possibilities once celestial bodies have been reached by adding..."