Kerbal Space Program has left Early Access. 1.0 comes packed with new features, optimizations, bugfixing, and tons more! Conquering Space Was Never This Easy!
User reviews: Overwhelmingly Positive (22,999 reviews)
Release Date: Apr 27, 2015

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Recommended By Curators

"A perfect blend of science and slapstick, and a robust and compelling sandbox of possibility. Simply outstanding."
Read the full review here.

Recent updates View all (20)

June 22

KSP 1.0.3 now Available!


KSP version 1.0.3 is now live! This revision brings several much-needed bugfixes and improvements, as well as a few new parts.

Most importantly, this patch introduces a big revision to the thermal system for parts. The heat simulation has been greatly improved, heat from reentry is now handled in a totally new (and more accurate) way, and we've also added five new Radiator parts, so you can have much more control over how your ship deals with excess temperatures.

We've also fixed a significant amount of bugs. You can find the complete changelog in our forums.

Happy Launchings!


74 comments Read more

June 4

Kerbal Space Program Gamer's Edition is now available!

Hello Everyone!

As you might know we've been working with Gamer’s Edition to produce the official physical release of Kerbal Space Program. With a physical edition we didn't want to give you just a USB drive or disc with the game on it, but we wanted to make something a bit more special, that's worth investing in. Like every Gamer’s Edition, the Kerbal Space Program collection includes a Steam code, is packaged in an individually numbered presentation box and is part of a one-off run that will not be repeated.

What’s in the box?

  • Four hand-painted Kerbal figurines - Bill, Bob and Jebediah Kerman plus a standard Kerbalnaut, each showing varying emotional reactions to the adventure that awaits.
  • A stirring diorama backdrop - which optimistically suggests you have made it to the moon.
  • Official Kerbal Space Program mobile - allowing you to ponder the hypnotic vastness of space and the quantity of space junk and unlucky Kerbals you have scattered across it.
  • Official Kerbal Space Program patch - proudly displaying the Latin motto of the program: “Demum Pervenius” (lit. We’ll Get There Eventually).
“It’s a real honour to partner with one of the most enthralling indie games of recent years”, said Jon Hicks, Head of Gamer’s Edition. “Having spent many hours abandoning Kerbals to uncertain fates in orbit, on the moon, or within several feet of the launch site, I feel more than qualified to do the same in the real world”.

The Kerbal Space Program Gamer’s Edition campaign runs from today until midnight BST (4PM PDT/7PM EDT) on the 29th of July and costs $85 (roughly £55). It’s available for purchase now at The Gamer’s Edition website.

If you wish to learn more about Gamer’s Edition you can find them on their
website, Facebook, Twitter and Instagram

Fly safe!

95 comments Read more

About This Game

In KSP you must build a space-worthy craft, capable of flying its crew out into space without killing them. At your disposal is a collection of parts, which must be assembled to create a functional ship. Each part has its own function and will affect the way a ship flies (or doesn't). So strap yourself in, and get ready to try some Rocket Science!

The game offers three gameplay modes: Sandbox, in which you are free to build anything you can think of; Science Mode, which lets you perform Scientific experiments to advance the knowledge of Kerbalkind and further the available technology; and Career Mode, in which you must manage every aspect of your Space Program, including administration strategies, Crew Management, Reputation, as well as taking up Contracts to earn Funds and upgrade your Space Center Facilities (or repair them).

Add to this the ability to capture asteroids (a feature done in collaboration with NASA), Mining for resources out across the furthest reaches of the Solar System, Constructing Bases and Space Stations in and around other worlds; plus literally thousands of mods from a huge active modding community, all add up into the award-winning game that has taken the space sim genre by storm.

Key Features

  • The Vehicle Assembly Building and the Space Plane Hangar allows players to build spacecraft out of any imaginable combination of parts.
  • Fully-fledged, Physics-based Space Flight Simulation ensures everything will fly (and crash) as it should.
  • Take your Kerbal crew out of the ship and do Extra Vehicular Activities.
  • Fly out to Moons and other Planets.
  • Procedural Terrain delivers detailed terrain at a vast scale. The Kerbal Planet is 600km in radius!
  • Mod-enabled, allows players to create new content and modify the game.
  • Ship systems. Keep an eye out for engine temperatures and fuel levels, and try not to explode.
  • Build ships with multiple stages, and jettison parts away as they burn out.
  • Full control over the ship’s setup allows for complex ships and advanced functionality.
  • Dock spacecraft together to build Space Stations, Massive Starships, or even surface bases on other worlds.
  • Manage your crewmembers, hire them, and send them out into space and make them into heroes.
  • Research and Develop new technologies to advance your Space Program.
  • Take on Missions to attract interest in your Space Program.
  • Discover new worlds and expand the scientific knowledge of Kerbalkind.
  • Extract valuable resources from all over the solar system.
  • And a whole lot more!

System Requirements

Mac OS X
SteamOS + Linux
    • OS:Windows Vista
    • Processor:Core 2 Duo
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:1 GB HD space
    • OS:Windows 7 or 8 64 bit
    • Processor:Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space
    • OS:Snow Leopard (10.6)
    • Processor:Intel
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:1 GB HD space
    • OS:Yosemite (10.10)
    • Processor:Intel Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space
    • OS: Linux (Most distros should work)
    • Processor: Core 2 Duo
    • Memory: 3 GB RAM
    • Hard Disk Space: 1.5 GB HD space
    • Video Card: SM3 512MB VRAM
    • OS:Ubuntu 14.04
    • Processor:Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space
Helpful customer reviews
225 of 229 people (98%) found this review helpful
8 people found this review funny
1,308.3 hrs on record
Posted: June 11
Words alone cannot express how amazing KSP is.

To be honest, this is not a game for everyone. If you are in the market for some fast-paced "space combat sim" with all kinds of weapons and big explosions, then this isn't what you are looking for. (Except for the big explisions... KSP has you covered there).

However, if you ever dreamed of actually being an astronaut, this is definitely for you. If you sometimes forget to breath when watching recordings of the Apollo moon landings, this is definitely for you. If precise, measured flying; careful planning; and delta-v budgeting are what drives you, this is definitely for you. If you want to learn about Orbital Mechanics and are dying to know what the Oberth Effect or a Hofman Transfer Orbit are, this is definitely for you. If you like Physics, this is definitely for you.

Optionally, if you just like building rediculously large rockets and watching them explode with glorious comedy when they fail catastrophically because you forgot ONE PART... then this is also definitely for you.

Kerbal Space Program is challenging, fun, frustrating, mind boggling, huge, hilarious, complicated, deep, and just plain awesome.
Was this review helpful? Yes No Funny
24 of 26 people (92%) found this review helpful
5 people found this review funny
72.5 hrs on record
Posted: June 10
I've only had this game for a month and I've already logged over 50 hours into it. Kerbal Space Program is NOT simply a game about building rockets, launching them, and seeing where they go. Its tagline is "Conquering Space Was Never This Easy", and that is true, it is easy, compared to doing it in real life. But don't let it fool you- KSP actually has a pretty steep learning curve. In the month that I've had this game, I've only just gotten my first satellite into orbit of Kerbin (KSP's version of Earth). I haven't even gotten to a single moon or other planet. But don't let that deter you. Look up tutorials for the game (Side note- The in-game tutorials are actually pretty terrible. I recommend finding ones online, such as Scott Manley's, who does a great job of explaining how the game works). The sense of accomplishment you get when you do accomplish those tasks- even if it's just setting up a simple probe like I did- is phenomenal. And from what I've seen, once you do manage to master the game, you can do basically anything. Never give up.

All in all, Kerbal Space Program is not just a game. It's a lifestyle.
Was this review helpful? Yes No Funny
34 of 46 people (74%) found this review helpful
4 people found this review funny
150.0 hrs on record
Posted: June 20
Spent 150 hours sending a kerban into the sun.

10/10 would do again
Was this review helpful? Yes No Funny
14 of 15 people (93%) found this review helpful
1 person found this review funny
135.4 hrs on record
Posted: June 20
When you play Kerbal Space Program, you find yourself becoming one of two types of individuals. Either you throw everything together and make things up as you go, or you spend equally as much time planning for a mission as actually flying it. Either way, mission success (whatever you define that to be) is always either painstakingly earned or astronomically lucky (pun intended). It's very hard to compare to the feeling of seeing a safe splashdown after one of your Kerbals (the characters that man spacecraft) has walked on the surface of another celestial body. It's also hard to compare to the humbling feeling you get when you've made it halfway across the Kerbol system after significant planning and execution time only to realize that you left your landing legs at home.

This game will frustrate and exhilarate you. Well worth the purchase.
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17 of 21 people (81%) found this review helpful
3 people found this review funny
423.5 hrs on record
Posted: June 24
Played the game for 400 hours on minimum graphics, discovered I could run the game at max settings just fine.

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