Featured Items
Games
Software Demos News Recommended

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.”
Read more

Buy Kerbal Space Program

$26.99

Recent updates View all (13)

0.24.2 Hotfix Patch Released

July 25

Hi again,

I'm sure most of you have noticed a mildly infuriating bug related to right-clicking parts after yesterday's patch... So did we. It was fortunately a simple fix, and we've got a hotfix patch available now.

Here's the changelog:

============================ First Contract (v0.24.2)

HOTFIX:

* Fixed a critical issue which prevented opening the right-click menus for several parts.


As always, the latest version is available on the download page at the KSPStore, or an automatic update will be headed your way if you're on Steam.

Happy Launchings,

Cheers

47 comments Read more

0.24.1 Revision Patch Available

July 24

Hi,

We've just released a small revision patch for KSP, version 0.24.1.



This patch contains several small and some not-so-small fixes, tweaks and minor improvements, as well as a few things that were requested by mod-makers.

Here's the complete changelog:


===================== First Contract (v0.24.1)

Bug Fixes and Tweaks:

Parts:
* Fixed a relatively serious issue with module loading which could result in missing modules if loading old craft.
* O-10 Maneuvering engine scaling was off. Engine rescaled to proper size (smaller).
* Fixed an issue with propellant-defined resource flow modes which prevented some configurations of Vernier engines from working correctly.
* Fixed an issue with some decoupler modules failing to apply ejection forces when activated.
* Fixed missing FX components on root parts after resuming a saved game or reverting.
* Fixed a potential issue with the internal maths in ModuleRCS, which could result in odd RCS response from center-aligned or stack-mounted RCS modules.

UI:
* Fixed an issue with the App Toolbar where mod apps wouldn't display/hide properly at the VAB.
* Fixed an issue with custom staging icons and switching vessels.
* Fixed an issue where the Messages Dialog in the VAB would drift out of place when discarding many messages.

Contracts:
* Fixed a bug in Rescue Kerbal contracts, where rescue by means of external seats or claws wouldn't complete the contract.

Tutorials:
* Fixed a save-related bug which made the Orbiting 101 tutorial impossible to complete.

Flight:
* Fixed vessels not leaving 'pre-launch' condition during take-off roll.
* Fixed a very annoying and potentially destructive bug where approaching another vessel could mess up your control state.

Game Balance:
* Tweaked costs for several spaceplane and aerodynamic parts:
- Advanced Canard: 900 -> 800
- Standard Canard: 1500 -> 720
- Delta Wing: 500 -> 680
- Swept Wing: 500 -> 620
- Wing Connector: 500 -> 560
- R8 Winglet: 500 -> 640
- Structural Wing: 500 -> 540
- Aerodynamic Nose Cone: 680 -> 240
- C7 NCS Nose Cone: 680 -> 320
- Rocket Nose Cone (large): 1000 -> 450
- Standard NC (small): 680 -> 180

Modding:
* Added IPartCostModifier interface, to allow part modules to tweak a part's cost.


As always, you'll find the new patch over at the KSP Store in zip or installer formats, or if you're on Steam, you should be auto-updated shortly (assuming you haven't turned off automatic updates, in which case you probably know what you're doing).

Happy Launchings!

Cheers

33 comments Read more
See all discussions

Report bugs and leave feedback for this game on the discussion boards

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 Vista
    • 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
    Recommended:
    • OS:Mountain Lion
    • Processor:Core i3
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 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
    Recommended:
    • OS:Ubuntu 14.04
    • Processor:Core i3
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space
Helpful customer reviews
3,395 of 3,498 people (97%) found this review helpful
324 products in account
9 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 19
Was this review helpful? Yes No
456 of 472 people (97%) found this review helpful
628 products in account
1 review
314.0 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 2
Was this review helpful? Yes No
376 of 410 people (92%) found this review helpful
76 products in account
9 reviews
2,171.4 hrs on record
Early Access Review
yha, its pretty good
Posted: April 7
Was this review helpful? Yes No
124 of 133 people (93%) found this review helpful
543 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 8
Was this review helpful? Yes No
88 of 118 people (75%) found this review helpful
493 products in account
67 reviews
4.3 hrs on record
Early Access Review
Just like Human Centipede, this game is medically and scientifically accurate.
Just like Apollo 13, you will have a lot of problems.
Just like Shakespeare, it will end in tragedy.
Just like NASA, you will not have enough funds to continue missions.
Just like your grandma, you will end up as ashes.
Just like Boy Meets World... except face first.
Just like Die Hard: With a Vengeance... except no vengeance.
Just like a Japanese Kamikaze pilot... except unintentional.
Just like your girlfriend's virginity... all will be lost.
Just like gay marriage... you will eventually get close.
Just like an adopted baby, you will long for reuniting with mother moon.
Just like a failed marriage, you wonder where it all went wrong.
Just like a muslim, you will scream prior to your death.
Just like a cookie, you will crumble.
Just like a crazed sociopath Jebediah will ALWAYS smile, whether he's being thrown into the sun or on a fire-reentry back into Kerbin Orbit. - (Cobalt Lightning)
Just like you have Alzheimers, you will forget your parachute - (Austin)
Just like war, It never changes. - (Dr. Strangelove)
Just like Peppi you'll use the boost to get through. - (Kodiak)
Just like Falco there will be something wrong with the G-diffuser
Just like Slippy, "Help me.....help me!"
Just like a large burrito. It looks delicious, but always ends up a terrible mess.
Just like a Stormtrooper you'll never hit your target
Unlike Luke Trusting your instincts will get you killed
Unlike Star Wars, the only force you need to be concerned about is Mass X Acceleration
Just like a necromancer, you'll have absolutely no life - (Kodiak)
Just like...
Posted: May 14
Was this review helpful? Yes No