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. 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. If you want to feel like a NASA engineer, Kerbal Space Program is the game for you.In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. There's an excellent and enthusiastic community of players, all willing to share their tips and tricks. There's an official wiki page with a wealth of help and tips to make sure your space program is going in the right direction. If you're discouraged by Kerbal Space Program's immediate difficulty, do not despair. It takes hours and hours of dedication, but it's a rewarding experience. Even managing this, you still have a lot to overcome before you can land on one a planet. Achieving escape velocity is relatively easy, but finding a stable orbit is a whole other challenge. Kerbal Space Program is tough because it's realistic, like every good simulator.

From the moment you make your first rocket, until you finally send a crew of astronauts successfully to the moon, the difficulty is pretty high. The cuteness of the Kerbals shouldn't make you think there is anything easy about Kerbal Space Program. You'll research new technologies in the the Space Center, learning from your successes and failures, training astronauts and so on. In Career mode, you progress through missions, with a tight budget. Hit the space bar, and it will hopefully go through the various stages you defined on its way to space. You won't find out until launch whether or not your rocket will be successful. You can do what you want, but your rocket will still conform to physics, so they will often result in spectacular and explosive failure.

In sandbox mode, there are no limits to the design of your rocket.

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