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Kerbal Space Program is a multi-genre game where players create their own space program.
Release Date: Mar 30, 2013
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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game may or may not change significantly over the course of development. If you are not excited to play this game in its current state, then you may want to wait until the game progresses further in development. Learn more

What the developers have to say:

“KSP is still under development. This means the game will be improved on a regular basis, through updates that add new features, content and bug fixes, so make sure to check back for new versions.



The game is being built as a sandbox first, so there are no objectives yet, but we want you to try it out and have fun with it already. You're free to build anything you can think of, and there is an entire Solar System to explore.



During development, KSP is available for purchase at a discounted price, which will gradually increase up to its final retail price as the game nears completion. So by ordering now, you get the game in its current state, and you'll get all future updates for free.”
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Buy Kerbal Space Program

$26.99

Recent updates View all (11)

Kerbal Space Program: First Contract Now Available

July 17th, 2014



Kerbal Space Program, the award-winning, indie space agency sim game from Squad, is launching its latest update, Kerbal Space Program: First Contract, as part of its active development cycle. This major release, numbered 0.24, is a substantial advancement in the game’s Career Mode, which challenges players to run a space agency. It is also the first time the game offers a 64-bit version for Windows via STEAM and the KSP STORE.

Players will now have the opportunity to take on Contracts, manage Funds, a new in-game currency that allows players to buy rocket and plane parts, and earn Reputation for their efforts. Players will take advantage of three new widgets on screen, Funds, Reputation and Science. Players aren’t charged for funds until their vessel launches and the total science amount is now displayed via the widget. Reputation is raised for completed contracts and bringing Kerbals back in one piece. Failing missions, or gasp, blowing them up lowers Reputation.

“First Contract is a massive step forward for Career Mode. Finally, we’re starting to paint a clear picture of our original vision for the complete thing.” creator and lead developer Felipe Falanghe said. “Although there is still a lot to add on future updates, the new Career features should help new players pick up the game in a much more structured manner. One of my favorite aspects, is how it’s added new challenges for even the most veteran players. We’ve found ourselves here, building contraptions we have never had the need to build before, and actually discovering totally new, fun ways to play the game.”

http://youtu.be/54fDJKgjUrs

Contracts are offered based on a player’s Space Program’s reputation, which starts off at neutral. After an initial set of starter contracts, dynamically generated contracts are created in three levels of ‘prestige’, from Trivial to Exceptional ones. Reputation regulates the amount and level of offers that are available. If a player’s reputation is low, he or she will be offered trivial, low-profile contracts. However, if a player’s space agency is well-reputed, contracts to attempt increasingly ambitious things will be offered.

  • Part Test: Perform a test of a part in a specific location, situation and within given flight parameters (when applicable).

  • Collect Science: Return or transmit any scientific data from a specific location.

  • Rescue Kerbal: Rescue a Kerbal who is stuck in orbit.

  • Plant Flag: Plant the Agency's flag on the surface of a given location.

  • Explore: Complete several exploration goals for an unreached location.


Contracts will be found in the new Mission Control building, which was previously not an interactive part of the Kerbal Space Center. Players will enter Mission Control and have the option of choosing between available contracts.

Players will also find new engines, updated parts and vessel recovery, which means you can reclaim the value of landed parts and any resources they contain, in the update.


You can also check out the full changelog on this article from KSP Forums.

Happy Launchings!

Cheers

81 comments Read more

KSP: Asteroid Redirect Mission is Officially Released!

April 1st, 2014

Hi,

I'm very happy to announce that the Asteroid Redirect Mission patch for KSP is now officially released!

http://youtu.be/H9fvjKVuULQ

This is a very special update in many ways, not least of course is that it was made in collaboration with NASA, to make sure our Kerbal version of the Mission was not only true to its real-life counterpart, but that it was also fun, educational, and in keeping with KSP's style, free to be performed in any way you can think of. Want to re-enact the exact mission profile NASA is planning? Go for it. Want to send up enough rocket fuel to lift an office building and slam on the retrograde brakes? That's also an option. Want to not do any of those things and just use the Advanced Grabbing Unit to choose which Kerbals go and which stay? Erm... sure.

This has been, without question, the largest update we've ever done, not just in terms of development time, but most importantly in terms of the scope of the changes made. No other update has had so many different areas improved on at the same time. We usually focus on a single area to work on, but this time, we really felt the need to make a noticeable improvement in the overall playing experience, especially around flight planning and advanced deep-space missions.

So, Here are the highlights for this update:

* Asteroids:
Kerbin is no longer alone in its orbit. Nearby are countless objects that buzz in and out of its sphere of influence, some flying by harmlessly, others on impact trajectories. Ranging in size from just a few meters through 5 size classes up to gigantic objects weighing thousands of tons, these new objects should provide a new challenge for both new and veteran players. Each asteroid is procedurally generated, so no two are the same. Also, asteroids can have samples taken from them by EVAs, providing a constant source of valuable science data, right on the edge of Kerbin's SOI.

* Object Discovery and Tracking:
Before you set out after an asteroid, you first need to identify and track them using the Tracking and Discovery features on the Tracking Station Facility. Select one of the unknown objects spotted near Kerbin, and start tracking it actively to reveal more information about it. Also mind that untracked objects can be lost if they're left unobserved for too long.

* The Advanced Grabbing Unit (aka "The Claw")
As the name probably implies, this new part is the means by which asteroids can be captured to be redirected. Just arm the device, approach the target carefully, and the claw will do the rest. It's like a docking node, but without the need for a mate node on the other side. Better still, the AGU can be used to grab on to much more than just asteroids. In fact, it can pick up just about anything, even Kerbals.

* New SLS-inspired Size 3 parts:
We've added a host of new parts, featuring the largest engines and fuel tanks ever seen in KSP. These new parts were designed based on NASA's upcoming Space Launch System, and they pack a huge amount of rocket power.

* Completely Overhauled Part Joints:
We have completely re-done the way parts attach to one another, to allow for much greater flexibility and control over each joint. Joints are also more accurate and stable, as both jointed sides are now anchored at the attachment node (this wasn't possible before the Unity 4.3 update).


There's more. This update also features a host of small, and some not-so-small tweaks and improvements to usability, giving many features added a good while ago a much needed refurbishing, and adding a lot of the little things we never got a chance to add when we first implemented them.

Check this post for the complete changelog

Release Notes:
* The ARM Patch (0.23.5) should not break backward-compatibility with previous saves. That said, however, do mind that we cannot account for mods, so don't expect them all to work perfectly. If you experience any problems, make sure you try a clean install of the game without any mods, and a new clean save as well.

* The ARM Patch is available just as any other update. You should be auto-updated next time you run the game. Just make sure you haven't disabled Steam's auto-update system for KSP.


Happy Launchings, and have fun!!

Cheers

150 comments Read more
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About the Game

Kerbal Space Program is a multi-genre game where players create their own space program.


In KSP, you must build space-worthy craft, capable of flying your 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 is being built first as an open sandbox, you're free to build anything you can think of, and fly it wherever you want, even into orbit and out to other planets and moons throughout the Kerbal Solar System. The first draft of the career mode is also available now, it is still in development, so expect more features!

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.

Planned Features


  • Take on Missions to attract interest in your Space Program.
  • Discover new worlds and expand the scientific knowledge of Kerbalkind.
  • And a whole lot more!

PC System Requirements

    Minimum:
    • OS:Windows XP
    • Processor:Core 2 Duo
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:1 GB HD space
    Recommended:
    • OS:Windows 7
    • Processor:Core i3
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space

Mac System Requirements

    • OS:Snow Leopard
    • Processor:Dual Core Intel
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:1 GB HD space

Linux System Requirements

    • 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
Helpful customer reviews
2,677 of 2,763 people (97%) found this review helpful
312 products in account
8 reviews
88.2 hrs on record
Early Access Review
One day my daughter came home from school and asked me "Have people actually travelled to the Moon? How is it possible?"

Two years ago, I would have answered "yes, but I don't really know how. It's very complicated, with lots of math and science. You might learn about it in a physics class in 10 years time."

Instead, I answered "Here, let me show you." and fired up Kerbal Space Program. We built a moon rocket and launched it, me steering and she hitting the separation detonation buttons when needed. 30 minutes later we had landed on the moon.

Thank you, Squad, for enabling me to give that answer.
Posted: March 19th, 2014
Was this review helpful? Yes No
272 of 284 people (96%) found this review helpful
597 products in account
1 review
291.9 hrs on record
Early Access Review
This is an incredible game, I've almost got 300 hours into it and I'm still looking forward to firing it up nearly every day.
There's a lot of reasons to buy this game:

* if you love space, this game will get you there, first hand, and let you have your hand at designing space crafts (and planes), flying them, and of course, crashing them in big glorious explosions

* you will learn a lot about space, physics, orbital mechanics, aerodynamics, etc... this really happens, I have two friends that are rocket scientists (one does ion drive research, the other designs micro-satellites, I work at a large university), and after playing this game for a few months, I could easily talk to them about their work, where they drop terms like ISP, TWR, retrograde, normals, etc, terms that I now fully understand

* the game is very approachable, you can play in "career mode" which walks you though the beginning steps of putting a rocket into space, to orbiting, to visiting the Mun and beyond. If you need more help, the YouTube scene is quite impressive, with people like Scott Manley producing really professional (and charming) video tutorial series. I am not a lover of simulation-type games, I play mostly FPS's and RPG's, but I found this game quite easy to pick and up get into.

* while approachable, this game is certainly not easy, for example, landing and returning from Eve (the Venus-like planet in the Kerbin system) is one of the hardest tasks in the game, and while most of the game is fairly non-stressful in its nature, landing spaceships is a tense experience, especially when Jeb's life is on the line! For those that find it difficult to master some of the more difficult tasks, there are impressive control mods like MechJeb2 where you essentially point at a spot on a planet and press the "Land There" button, MechJeb does the rest.

* the game has a unique charm to it, in the game you are progressing through the space race for the people of the Kerbin panet, you'll get to know and love the kerbalnauts that will fly your craft, especially Jebediah Kerman, pilot extraordinaire and fearless hero to the Kerbin people

* the community for this game, is active, organized, and quite friendly, mostly found on Reddit and the Squad forums, you can get any question answered, or read mission reports from someone's latest mission, or get news on upcoming updates for the game. The only time you see people getting belligerent on these forums is when some is misbehaving toward others
Squad is actively developing this game, each release (every new months) bringing a lot of new features and parts to build with, and just this week the update to KSP brings many new rocket parts built in collaboration with NASA plus a mission to save Kerbin from killer asteroids!

* the mod scene for this game is extremely impressive, from new real-life inspired rocket parts (so you can build your own Saturn V), to impressive new systems that enable for example planetary mining (so you can get more fuel on route to your target), to just plain fun mods like the nuclear pulse rocket, which explodes varied-sized nuclear bombs behind a large plate to produce thrust (scientists actually design this beast in the 50's)

* the endgame is rich and deep: once you've completed career mode, many KSP players switch to the realism mods, which give you the real solar system, truly deadly reentries, realistic communication constraints (that require building satellite networks), more realistic aerodynamics modeling (e.g., Ferram's amazing FAR mod), real life-support constraints, etc. that make for a significantly more challenging and rewarding experience; if that doesn't trip your trigger, the forums have organized challenges with leaderboards, to see who can, for example, get to the Mun with the least number of parts, or eject the most Kerbals out of the solar system, all great fun with the competitors meticulously documenting their missions

If these things sound interesting to you, get this game! It was the best $25 bucks I ever spent!
Posted: April 2nd, 2014
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175 of 183 people (96%) found this review helpful
76 products in account
9 reviews
1,992.5 hrs on record
Early Access Review
This game has honestly changed my life. I have always thought NASA and space flight was cool but it was nothing I ever really put any thought into. But since I first played Kerbal Space Program a passion for space flight grew in me. Since then almost all of my free time has been dedicated to finding out anything and everything I can about NASA history, human spaceflight, and events current in space. I have since participated in the US Space & Rocket Center’s Advanced Space Academy, visited the Kennedy space center, made contact and met with an astronaut, as well as established a relationship with somebody high up in the NASA chain. I My future will forever be changed by this game, so yha... buy it
Posted: April 7th, 2014
Was this review helpful? Yes No
586 of 827 people (71%) found this review helpful
100 products in account
8 reviews
1,551.6 hrs on record
Early Access Review
Buy it.
Posted: March 10th, 2014
Was this review helpful? Yes No
53 of 56 people (95%) found this review helpful
536 products in account
5 reviews
34.9 hrs on record
Early Access Review
10/10 - I would recommend this to anyone without hesitation.

I studied physics at college and have been really enjoying trying to play this game properly - doing all the maths, achieving things, unlocking new technologies, etc and it is really absorbing. Constantly challenging, rewarding and entertaining and always with the potential to turn into a huge time sink.

If you don't like doing sums then there is an incredibly enthusiastic community and all kinds of advice and mods to automate stuff and help out with the tricky bits.

If even that sounds like hassle then you can still have endless entertainment in sandbox mode loading crazy green dudes on the biggest phallic stacks of volatile chemicals that you can make and then seeing what happens next.

It really has something for everyone. It isn't cheap for an indie game but I doubt enyone will regret their purchase. It is early access but the developers and community are much more lovable than most other early access games I have tried.

I seriously can't think of anything bad to say about this title.
Posted: April 8th, 2014
Was this review helpful? Yes No
2,677 of 2,763 people (97%) found this review helpful
312 products in account
8 reviews
88.2 hrs on record
Early Access Review
One day my daughter came home from school and asked me "Have people actually travelled to the Moon? How is it possible?"

Two years ago, I would have answered "yes, but I don't really know how. It's very complicated, with lots of math and science. You might learn about it in a physics class in 10 years time."

Instead, I answered "Here, let me show you." and fired up Kerbal Space Program. We built a moon rocket and launched it, me steering and she hitting the separation detonation buttons when needed. 30 minutes later we had landed on the moon.

Thank you, Squad, for enabling me to give that answer.
Posted: March 19th, 2014
Was this review helpful? Yes No