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 (21,839 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 (18)

May 1

KSP 1.0.2 is up!

Hi again,

Just a very quick update this time, version 1.0.2 is now up:


v1.0.2 ==================================================

Bug Fixes and Tweaks:

* Fixed ships potentially overheating when splashed down.

* Small tweak to Mk16 parachute drag.

As always, you can get the latest version from our KSPStore, GOG, or get auto-updated on Steam.

Happy Launchings!


107 comments Read more

May 1

KSP 1.0.1 is Up!

Hi Again,

We've just published KSP v1.0.1. This is a small revision patch to address some of the most noticeable bugs we encountered since the release of 1.0.

Some of these we knew about for a while, but couldn't fix in time for the release (as we approach publishing time, the risk of code-breaking and delaying the entire release outweighs any benefits in the potential fix), others we found out about during the weekend livestreams, and some others we found from your own feedback.

This patch isn't meant to cover every single bug, of course, just the more relevant ones. We're going to keep on with the bugfixing and tweaking as we move into development of version 1.1.

You can check out the complete changelog in our forums.

As always, you can get the latest version from our KSPStore, GOG, or get auto-updated on Steam.

Happy Launchings!


54 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
17 of 22 people (77%) found this review helpful
1 person found this review funny
76.4 hrs on record
Posted: May 16
Orbital mechanics for fun and profit. It is the best game. If you need a hand getting started look up Scott Manley on Youtube, he has an excellent series of tutorials and miscellany on KSP. Alternatively just play in Sandbox until you make things which don't explode immediately (or things which do ...for science).

Note: You may actually end up learning science so you can get better at this game.
Was this review helpful? Yes No Funny
13 of 17 people (76%) found this review helpful
3 people found this review funny
129.1 hrs on record
Posted: May 16
10/10 would learn rocket science again
Was this review helpful? Yes No Funny
11 of 16 people (69%) found this review helpful
1 person found this review funny
243.1 hrs on record
Posted: May 16
Do you like space?
Do you like sandbox-type games?
Do you like explosions?
Are you in for a challenge?
Then this is the game for you!

Although this game has quite a steep learning curve, once you get past that (the community will surely help you), you can have many, many hours of fun. The possibilities are endless; from satellites to space planes and from lunar bases to interplanetary holidays.

I can definitely recommend this game
Was this review helpful? Yes No Funny
6 of 7 people (86%) found this review helpful
1 person found this review funny
73.6 hrs on record
Posted: May 22
It's been quite a ride. Four long years of development, cool stuff, accidentally education, and the Kraken... and here we are. One point oh (point whatever!) And oh, are things different! But that's all the past! Let's talk about the present.

This is a game in which you go to space repeatedly, success optional.

Most of the entertainment value in this game is either limited or boosted by your imagination. You can just throw some bits together, hit the go button and see what happens! What's that? There are Kerbals in there? I'm sorry, I couldn't hear you over the sound of my massive explosion device. Conversely, you can put things together in a very particular manner and create the perfect interplanetary shuttle. It's all up to you. Your sandbox is the solar system. Go play. Due to the nature of things and such, this game would be truly incredible in a classroom environment, yet it's just as fun alone at home.

Now, for the less sandbox-oriented among us (or just the people like me who enjoy progression,) there's a career mode! This time, you start out with the exclusive ability to make short range, manned, ballistic missiles! FOR SCIENCE! Seriously, you generate Science! from everything, and you use it to unlock more things to build better missiles to make more Science! Be careful though. Don't want to blow up too many bits, because you have funding to worry about now. You should also take care of your Kerbals to keep your reputation acceptable.

Also the camera shakes, there's complicated aerodynamics, there's thermodynamics, there's moresodynamics, there's orbital mechanics, there's resource mining (which you can MAKE FUEL with,) there's management, there's pretty explosions, there's good sound effects that are also deafening, there's accidentally education, and so much more for only some money!

However, the tutorial is absolutely useless and frustrating. Ignore it, fumble around for a while, and utilize the internet to learn what you must know when you decide that trial and error is so last era.

There's not really much else to talk about... All the other details are either not noteworthy, neutral, or better kept quiet... so...

Go build some intercon- advanced spacecraft.
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5 of 8 people (63%) found this review helpful
34.1 hrs on record
Posted: May 19
It's good
Was this review helpful? Yes No Funny
2 of 3 people (67%) found this review helpful
167.0 hrs on record
Posted: May 21
Great learning game. Incredibly fun once you get into the swing of interplanetary travel.
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2 of 3 people (67%) found this review helpful
36.6 hrs on record
Posted: May 18
Before play KSP I have no ideas how hard it is, to design something that is able to go to the space and come back in one piece.

Exploration is human's nature, our curiosity drive us into the deep space imagining what will be waiting for us. Well, lucky you, if you are a science nerd, rocket fetish, got a lot of A plus on you Physic's examination, KSP is the perfect game for you to spend some time for a adventure. From experience, KSP has no flaw, apparently my expertise aspects are limited to artistic titles, video game, design. For science, I'm not even amateur but if you ask me if there are any features that I wish was in the game or will be added, I would like see more solar systems and most importantly flora and fauna.

So far my suggestions seems intriguing, but there's a problem for gamer who wish to see faster results, if so,I warn you that you won't go further into the game. That will be a waste of money, in my opinion. KSP has some necessary built in tutorials but that won't be enough for someone like me, amateurs, to get into orbit. Don't worry, that doesn't mean we are just going to watch others building fancy things. There is a joke about KSP, whoever ask a question in KSP community thousands reply "Scott Manley"! Luckily we have our self a mentor on Youtube to teach us all the essentials that is required to "enjoy" the game.

Assuming you are an amateur like me, whichever mode you started you will either get overwhelmed by all the parts that is displaying in front of you and you can't even make a damn thing out of them, or you are staring at a 4 or 5 parts and you have no ideas where this is going. If you are not a patience gamer, KSP can only be a cheap fun, you build some weird aircraft and spacecraft, fly around, click some buttons. Then KSP is definitely not a game for you and that's why spend times watching Scott Manley's tutorial is required.

I had a hard time to learn the essentials, but Scott Manley is professional enough if you pay attention to his lessons. Most of the gamers will probably think, why the heck do you need to learn to play a game? Well KSP provide a strong realistic feelings (career mode), gravity, weight, budgets, design possibly everything that is related to build a spacecraft in real life is in this game. You can play it casually but you won't fully dig into this game.

Failure will be inevitable, especially to people like me, I know very little things about spacecrafts, going through atmospheres, get overheated, can't even lift off the ground, can't return to ground, can't make a round orbit, suck at rescue mission, can't go to "moon". These frustrations are necessary but will eventually beat you, and you will rage quit. I remember I was doing a rescue mission where there are 3 astronauts need to be saved in low orbits, I successfully extract all of them but I got overheated exploded when return to "Earth". Yes, I didn't save it.

Overall, KSP is a high quality space simulator, and a lot of potentials for you to discover, forgot to mention that KSP fully supporting mod which make this game even better! I do suggest you play the original game first then try some new mods. KSP gave me a lot of good memories, the moment that I reach the "moon", the moment that I reached north pole, you really feel that all that efforts worth it and it is so thriller and satisfying to achieve something in KSP. That's what makes this game so special, after I became a decent player, I started to realize why conquering space is not that easy, as the title says. A true experience about learning and practicing space and aero technologies that you will ever go through. Highly recommended! TO SPACE!
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3 of 5 people (60%) found this review helpful
1 person found this review funny
58.8 hrs on record
Posted: May 18
If you have a space fetish or just have a general interest in anything space related then this game is well worth your time and money (sale). You will learn a great deal in the process, and you will experience a fair share of eureka moments. Not to mention this game is even distributed to some institutions as a learning tool.
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4 of 7 people (57%) found this review helpful
1 person found this review funny
12.8 hrs on record
Posted: May 18
Topkek simulator
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800 of 813 people (98%) found this review helpful
18 people found this review funny
520.7 hrs on record
Posted: February 26
Early Access Review
1st hour playing: WHAT DO I DO WHY IS IT BLOWING UP
400th hour playing: If my calculations serve me right with this T/W ratio It will take me 1 minute 43 seconds to burn at my periapsis to reach duna insertion at which point I will get into an eliptical equatoral orbit and perform an aerobrake at 16km to get into a steady circular orbit and then I will descend with one of my 4 spaceplanes I took to go to the north pole at which I will set up base at my already existing rover while getting TAC resources to monitor life support and make sure my colony of 212 kerbals can live.


Edit because for some reason this gained popularity, proper review:

Endless fun, so much to do. Bored of building rockets? Build a space plane! Fed up of the mun? Go to Duna! Don't want to leave the atmosphere? Build whatever you want! The list goes on!

Fantastic modding community and fantastic mods. So much more expansion on an already amazing game.

Fantastic community in general, some of the nicest people I've met have came from this game. They are such a helpful bunch and I'm glad I'm with them! They'll most likely love to help you. There's also a bunch of fantastic YouTubers such as Scott Manley and others... (too many to name) :)

YOU CAN LEARN STUFF FROM THIS AND GAIN NEW INTERESTS! Before I played this I had no interest in space or space exploration whatsoever but now I actively follow space news and am quite knowledgable on the subject. I have also learnt a fantastic deal of orbital mechanics just from playing and learning the game.


The engine and optimisation. This game uses Unity and it only uses 1 CPU core. This can be a major problem if running a multicore with low clock speed. The 32bit version of the game is a whole lot more stable but limits your RAM meaning that if you have a ton of mods you can run into a lot of crashes but thankfully there are mods out there such as ATM (Active Texture Management) and texture replacer to limit the amount of RAM the game uses. 64bit as of now is still pretty unstable with mods.

The learning curve and tutorials. The learning curve on this game is huge, I'm not complaining much about this one as rocket science isn't exactly easy is it? You can learn from trial and error and it's how I learnt alot but some things you just have to read up about or watch a tutorial on youtube. There isn't really much of a tutorial in game either.

Conclusion: Buy it. It's really fantastic.
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672 of 689 people (98%) found this review helpful
1 person found this review funny
426.4 hrs on record
Posted: December 8, 2014
To remove any doubts, this is by far THE best space simulator out there.
The Good
  • Amazing learning experience
  • Choose where you want to go, with what, when, and how.
  • HUGE planets to discover, literally, thousands upon thousands of kilometers to walk, drive, or fly your epic creations (or, if your not very creative, preset or other players' ships)
  • Create awesome rockets, landers, bases on other planets, and spaceplanes, the way you want them
  • Fun science mode to work your way up, earning "science" in order to get better equipment and rocket parts (I recommend for newish players who at least know how to get to the Mun)
  • "Creative" mode where all parts are unlocked (great for testing and trying new things)
  • "Career" mode for those really wanting a challenge (balance economy, science, and reputation for your own space organization, I recommend having a little more experience before jumping right in)
  • They are still adding to this game... several user created mods really expand on the experience
  • Built off of real physics! One doesn't just lop space junk up into the sky; one must deliver that space junk the actual way and make Kepler and Newton proud!!! (generally speaking, it allows one to see how actual launches and orbits work)
  • Many other great aspects to this game (however, this would be a long list with all of them)
The Bad
  • Graphics aren't the best, however, they are still good and create a real sense of depth and can deliver a "lost-in-space" kind of a feel... It makes me feel so small compared to the vastness of our world. Plus, the graphical style really fits the style of the overall game.

  • Somewhat steep learning curve- It took me a while to learn to get to the "Mun." After this achievement, it was a lot easier to get to Minmus after this. It was difficult to get to Duna, however, once I got there, I have gradually learned enough to go pretty much anywhere and have made a permanent base on Laythe complete with science lab, crew pod and a brand spanking new air breathing engine jet transport, as well as a souped up Rover for them to drive. I have been to almost all of the planets. So basically, it takes time to get "good" at this game, but I assure you, it's rewarding and so spectacular to see how huge this world is (And this one is scaled down, too!). However, new tutorials should be very helpful for the beginner.

  • not too much music (it's still good, just gets repetitive sometimes) (*ahem* devs please add more music :KOh: )

  • Getting to further out planets can take a long time, because it is a little more difficult and takes more resourcefulness... (several hours if your like me and really take your time, especially if you send a 3 manned mission to Eeloo... [you'll get faster the more experience you get though])

Overall, this is a wonderful simulator offering a lot of real science with fun, providing lots of hours of engaging gameplay. I am so happy the developers have successfully brought this amazing game out of beta. I have purchased this game so long ago, and the updates have vastly improved the game and have solved many of the problems I have dealt with. Thank you for reading this book of a review, and I hope this really helps. Feel free to leave a comment if you have any questions, I have over 400 hours logged and played the demo for several hours. I will try to get to them as soon as possible. Happy Kerballing!!!
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960 of 1,005 people (96%) found this review helpful
2 people found this review funny
78.2 hrs on record
Posted: April 27
This game should be standard issue in school physic classes. Taught me more about orbital mechanics than anything else.
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2,057 of 2,230 people (92%) found this review helpful
14 people found this review funny
209.3 hrs on record
Posted: December 1, 2014
Early Access Review
If I had this in 4th grade computer lab instead of Oregon Trail I would be an astronaut right now instead of dying of dysentery.
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336 of 341 people (99%) found this review helpful
4 people found this review funny
112.7 hrs on record
Posted: November 23, 2014
Early Access Review
If you have a deep longing to attempt landing on the surface of a star, or the gumption to fling countless people into space without any consideration toward their lives, then this may be the game for you. Failure is the only option.

Most of your best stories will have nothing to do with what went right on a standard planet-to-planet maneuver, or how you really nailed that Hohmann transfer. No, it'll probably be the flaming wreckage you created where no one should have survived, but somehow did. My game once glitched as a Kerbal was falling from the upper atmosphere and he bounced on the surface. He bounced! And not in the crumpled heap of flesh and bone matter way. He bounced off the ground and appeared to be coming in for a graceful finish to a mission gone horribly wrong--the only type of mission that truly exists. He fell from space! And lived! Forget space, erect a statue!

My first manned mission to the Mun ended in predictable failure. I tried landing without any sort of landing gear. How, you might ask? By landing on the engine so it was primed for vertical takeoff. I forgot about my horizontal velocity, however, and ended up ripping the engine apart. I had all the fuel I needed for a return mission, but the broken engine was left kilometers away. Oops. At least I could plant a cool flag.

I attempted a rescue mission, because that is the first irresponsible thing everyone always thinks to do: stranded person in space? Send more people to help them! The first mission collided with the Mun at 600 m/s. Rough landing. The second mission landed, but I was probably 50km away--which isn't all that bad, all things considered. I had the stranded Kerbal run toward the landed ship, but it was taking forever. So I started using his little jetpack to expedite things. Lemons and lemonade. As it turns out, you can actually disintegrate a Kerbal if you get too much forward momentum and collide with something solid, like the surface of the Mun. You will forever be in our thoughts, Mac Kerman.

So much for the rescue. I may as well have the rescue team return safely. Remember that landing gear part? Yeah, I still hadn't updated that section of the ship. Instead I landed on my side and planned on using elevation as a natural ramp. Bulletproof logic. At least this Kerbal had the dignity of a fiery, fiery death. An honorable death. By my own hands.

In KSP, your little Kerbal guys can die and be listed in the ambiguous "Lost" column. It was with great sorrow that I saw Mac Kerman's name in there. I didn't care so much about the other guys. Who cares about the second guy on the Mun? But here's the thing, several years into my career mode Mac magically reappeared and was ready for action! He came back from the dead! And what was the first thing he wanted to do? Go back into space! To die again!

In conclusion, yes to this game. Just yes. I currently have a Kerbal orbiting the second moon, Minmus. Yes, he is in a stable orbit without a ship. Just him. And he's been there for close to 30 years now. I'll get around to that at some point.
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1,817 of 2,041 people (89%) found this review helpful
11 people found this review funny
85.3 hrs on record
Posted: December 20, 2014
Early Access Review
An Incredibly realistic depiction of North Korea's space program.
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429 of 456 people (94%) found this review helpful
11 people found this review funny
36.2 hrs on record
Posted: April 28
Parachutes do not work on the moon. Many Kerbals died to bring us this information.

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986 of 1,105 people (89%) found this review helpful
1 person found this review funny
722.0 hrs on record
Posted: April 27

Ruined Science Fiction Movies with now learnt knowledge of real-life Astrophysics
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434 of 478 people (91%) found this review helpful
3 people found this review funny
66.3 hrs on record
Posted: December 12, 2014
Early Access Review
I've learned more about orbital mechanics in a few hours of playing this game then my entire life up to this point. Very cool.
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198 of 201 people (99%) found this review helpful
4 people found this review funny
806.8 hrs on record
Posted: April 28
There are no other games really like this. You will, in a terribly entertaining way, learn some fundamental of orbital mechanics, rocket science, aerodynamics, astrophysics and even a bit of mechanical engineering and straight physics.

There is nobody to shoot, no zombies, no monsters, no combat. No grand conquests and raising flags over captured enemy bases. Yet you have never and will never play a game that will challenge, entertain and reward you like KSP will. The learning curve is stiff but not terrible. You play it at your own pace because, well, there is no other pace you can play it at. Games like Dark Souls are 'hard' because you've got to have the right mix of luck and muscle memory and you have to throw yourself at it again again. KSP can be hard because calculating the right setup for the right injection burn to put you in a viable position to get past Ike into a stable orbit around Duna with enough fuel to get you home is a staggering undertaking, a lot of planning and forethough.

This is one of those games that changes gaming. You will kick yourself, repeatedly, when you look back and realize you didn't have a chance to play KSP.

It is a complex, indepth, engaging, well balanced and changing but simplified to make it fun to play simulator for building and deploying rockets and ships to go into space, visit and explore other worlds and travel a solar system.

The developer is a big part of this success. One of the first trail blazers on 'early access' they have been amazing for involving the community. Several of the top modders for KSP (they love and support modding in KSP - not to fix bugs but add content) were engaged and used in building content for the 1.0 release even. They are still engaged in improving and adding content to KSP.

I've got close to 800 hours in at this point and still haven't really played swaths of the game, there are dozens of mods I want to try but haven't had the chance. This is the kind of game that's fun and engaging for years and years. Sometimes you need to step outside the regular run of the mill and see why a game like this has tens of thousands of reviews that are almost universally positive.
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323 of 353 people (92%) found this review helpful
4 people found this review funny
35.6 hrs on record
Posted: April 9
Early Access Review
have major science test tomorrow
screw studying
play KSP for 12 hours
Test rolls around
Ace it with 105% (bonus points)
only person in school to do this
teachers asks how
say that Jeb helped me
she asks who Jeb is
look her in the eyes

he's a badass


No really. Get the game. It's amazing. (I acutally did ace that science test)
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