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:
Very Positive (566 reviews) - 92% of the 566 user reviews in the last 30 days are positive.
Overwhelmingly Positive (31,555 reviews) - 97% of the 31,555 user reviews for this game are positive.
Release Date: Apr 27, 2015

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Recent updates View all (32)

June 21

Kerbal Space Program patch 1.1.3 is now available!

Hello everyone!

The 1.1.3 patch is now available! We’ve taken our time over the past couple of weeks to tackle as many issues as we could in this patch and the results speak for themselves: close to 100 fixes have been logged compared to the previous version of KSP, and we even found time to hide something small in the game that we’re sure a lot of long time fans will appreciate!

Check out the full changelog at our Forums.

345 comments Read more

April 30

Patch 1.1.2 is now available!

Hello everyone!

We noticed a number of issues persisted through the 1.1.1 patch earlier this week. We’re releasing patch 1.1.2 to address these issues before we head off to a long overdue vacation for the next couple of weeks. Patch 1.1.2 addresses issues with the user interface and landing legs, amongst others.

Check out the full changelog on our forums.

The Patch will start downloading through your Steam client automatically.

173 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 or 7
    • Processor:Core 2 Duo
    • Memory:3GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:4 GB HD space
    • OS:Windows 8 or 10 64 bit
    • Processor:Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:6 GB HD space
    • OS:Mountain Lion (10.8)
    • Processor:Intel
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:4 GB HD space
    • OS:El Capitan (10.13)
    • Processor:Intel Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:6 GB HD space
    • OS: Linux (Most distros should work)
    • Processor: Core 2 Duo
    • Memory: 3 GB RAM
    • Hard Disk Space: 4 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:6 GB HD space
Customer reviews
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Very Positive (566 reviews)
Overwhelmingly Positive (31,555 reviews)
Recently Posted
214.7 hrs
Posted: August 31
Played for hours, build giant flying monstrosties, melted graphics card. 10/10 would do it again
Helpful? Yes No Funny
104.1 hrs
Posted: August 31
Please make me stop playing this. I need serious intervention because I am totally in space right now. And I want more. I need to set up my orbital station around the planet, and I need my secret moon base in full operation status. And I'm planning an even further trip to explore neighboring planets. Help me because my time is warping faster than the game's time, and I need to build more things. Rockets, planes, and rocket planes! Oh my!

Seriously, if you love or even have a small interest in rocket science or just love building and blowing things up, then KSP is for you. Watch dozens of Youtube videos for help and ideas. Shout out to Scott Manley for his brilliance in guiding new astronauts to the stars.

This game has a witty sense of humor when it comes to the design and description of all the various parts you can use to assemble your next ship. There are lots of great designs, and everything looks custom with a certain personaility provided per manufacturer. It does have a cartoony feel, but that can annoyance was easily overcome once I moved into the hard mode pace of career mode.

Audio: Turn up the bass before lift-off and hear what rockets should sound like if you never watched a launch.

Gameplay: Space and lots of it! Explore! There are still bugs that crop up now and then that can leave you feeling frustrated. But don't despair, they're working on it! Additionally, the interface is a bit clunky and without a supported joystick, a lot is left to be desired for sensitive control motions during some flight mechanices.

11 out of 10. For shear enjoyment and frustration for rockets that spin out of control and hit mission control.
Helpful? Yes No Funny
135.3 hrs
Posted: August 31
Nice game, nice idea. Just honestly, such a ♥♥♥♥ing awful control interface.
Helpful? Yes No Funny
You've Got No Fans
1,139.7 hrs
Posted: August 31
I've played almost 1140 hrs at this game and enjoyed every second of it. Highly recommended however please watch videos when starting out because I bought this early beta so the learning curve was a bit easier as was playing the actual game. Once you crack it this game is ace.
Helpful? Yes No Funny
9.1 hrs
Posted: August 31
I'd previously seen gameplay of KSP but thought it looked to complicated for me. After watching a couple hours of Giant Bombs feature: Kerbal: Project B.E.A.S.T. I got enough info to feel comfortable with it. The tutorials are simple and easy to understand, and I'm sure I'll get to the Mun once I stop building huge multi-stage rockets in sandbox mode. The game is fun even for spectators, and it can be hilarious when staging get's mixed up or a project fails. This is a very unique game, and I think the developer did a great job.
Helpful? Yes No Funny
194.8 hrs
Posted: August 31
I higly sugest buying this game. Try to go through carrier mode in the most efficient way, create the dumbest space crafts and whatch them tumble through space, or enjoy the faces of terror of your astronauts moments before their deaths.

It's very easy to learn how orbital mechanics work, maybe you will struggle with building large spaceships in orbit, but you can perfectly explore every corner in the game without doing so, so no problem. Also when you play career don't bother on reading the mission descriptions, they are just meaningless semiprocedurall nonsense, just read the mission conditions and how much they pay you. ;)

Even if you get bored of KSP or you dislike with some of it's features you can easilly install a great variety of mods to change that. Want the solar sistem to be more like in real life? There is a mod for that. Want to have a ridiculously small solar system with 10 times smaller planets? There is a mod for that. Want to find new ways to kill your kerbals? There are DOZENS of mods for that.
Helpful? Yes No Funny
16.0 hrs
Posted: August 31
This is a ridiculous, laugh out loud, stand up and applaud, fun, fun, fun game, with an extra helping of rockets and science on top. Oh and the Kerbals are just so darned cute, as are the rockets and the science for that matter.

I'm going to stick my neck out and say that this game is better than Spinal Tap. This game goes all the way to 12, which is 1 better than 11.

Game. Changed. 12/10.
Helpful? Yes No Funny
40.7 hrs
Posted: August 31
A brilliant, fantastically difficult, immensely immersive build and test game. Best game I've played in years!
Helpful? Yes No Funny
71.7 hrs
Posted: August 31
This game starts out as an innocent little spaceship simulator about getting your little green men to the moon. A mountain of a task full of plenty of errors and a comical game at that. The game is so good that it can consume you. All the planning, all the adventures to be had, races with friends to get to the moon on budgets if you decide. A hell of alot of mods online for it to go even crazier than what it is right now!
Career mode gives you set goals to achieve and well worth it. The dificulty and settings can be adjusted before you start, but dont go too dificult else it'll end up being a grindfest(thats not what this game is about).
Make your own flag!
Make your own ISS!
Make your own Moonlander!
make your own Mars Base!
Live the dream!
Also, buy this game.
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
340 of 367 people (93%) found this review helpful
408 people found this review funny
118.4 hrs on record
Posted: August 12
Builds rocket that can leave launchpad

Forgets parachute

Builds rocket that can leave atmosphere

Forgets heatshield

Builds rocket that can go to the mun

Forgets landing legs

Builds rocket without forgetting anything

Forgets real life

Remembers parachute
Was this review helpful? Yes No Funny
386 of 443 people (87%) found this review helpful
522 people found this review funny
2,015.6 hrs on record
Posted: August 12
Not sure if I'm into this game... Need to play a bit more to confirm...
Was this review helpful? Yes No Funny
184 of 200 people (92%) found this review helpful
180 people found this review funny
544.2 hrs on record
Posted: August 12
I've learned at lot more about space in this game than I did in school.
I also kept missing school because I was playing it instead.
Was this review helpful? Yes No Funny
221 of 261 people (85%) found this review helpful
136 people found this review funny
256.7 hrs on record
Posted: August 10
This game made me discover Scott Manley. 10/10 - Would discover Scott Manley again.
Was this review helpful? Yes No Funny
157 of 181 people (87%) found this review helpful
140 people found this review funny
233.4 hrs on record
Posted: August 5
1 hour in: Bookmarked useful orbital manuvers...
10 hours in: Put sitcky note reminders on screen...
50 hours in: Doodled rocket designs on the back of any avalibe piece of paper...
100 hours in: Drew the Kebin system on desk for mission planning...
200 hours later: Wrote mission plans and equations on walls...

10/10 Would deface walls again.
Was this review helpful? Yes No Funny
47 of 52 people (90%) found this review helpful
5 people found this review funny
29.9 hrs on record
Posted: August 10
Ok, i've got lots of thinks to say about KSP, but I'll try to be clear, so let's begin!
This game nowadays is the best flight simulator i ever seen.
The potentials of this game are endless, you can do everything you want!
But this game wouldn't be the same without its community.
The KSP's comunnity is on of the best comunnity in the game's world!!
Seriously! I don't have many hours on the game (I hope not for too long ;) but i've never seen rude persons (yes, you'll say "This game is only Single Player!") but, trust me, the community is amazing!
I'd like to thank everyone who helped me when I started playing.
There are tons of useful mod, and if you have any questions, certainly there will be an answer in some forums or in some webpage.
Buy this game absolutely, specially if you are smart and you like to planning and studying the wounderfull game's mechanics.
Was this review helpful? Yes No Funny
50 of 63 people (79%) found this review helpful
24 people found this review funny
249.0 hrs on record
Posted: August 27
Who needs No Man's Sky when you got KSP?
Was this review helpful? Yes No Funny
49 of 70 people (70%) found this review helpful
33 people found this review funny
23.2 hrs on record
Posted: August 16
< Be me
< Download KSP
< Launch ♥♥♥♥♥♥ space shuttle
< Stage it incorrectly, first Kerbal dead.
< Google "KSP Tutorial"
< See Scott Manley KSP Tutorial for beginners
< Watch entire series
< Go back into game
< Im an expert now, NASA, sign me up
< Launch space shuttle, get into orbit
< Success
< Want to go to the Mun
< Go to the Mun after days
< Start to draw blueprints for space shuttles in class
< Come home, make shuttle, go to Mun once more.
< Bring home space rocks
< Apollo 18 all over again c;


< Want to go to other planet
< Make space station, modeled after the ISS
< Decide to actually buy game from steam

< Launch ♥♥♥♥♥♥ space shuttle.

11/10 - Would launch ♥♥♥♥♥♥ space shuttle again.

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28 of 39 people (72%) found this review helpful
31 people found this review funny
142.1 hrs on record
Posted: August 13
- built rocket
- forgot to stage it correctly
- Jeb dies, (again... for 25th time), on launch pad
- Jeb's family rises and revolts
- new rocket.... Aimed at Space Center, (THIS IS FOR JEB!!!)
- Conflict spreads through out solar system
- War.... War Never Changes...

10/10 , would start war on kerbin again!
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19 of 29 people (66%) found this review helpful
16 people found this review funny
94.1 hrs on record
Posted: August 2
Yay! I'm a rocket scientist now.
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