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:
Recent:
Very Positive (577 reviews) - 94% of the 577 user reviews in the last 30 days are positive.
Overall:
Overwhelmingly Positive (30,542 reviews) - 97% of the 30,542 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.

165 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.

169 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

Windows
Mac OS X
SteamOS + Linux
    Minimum:
    • OS:Windows Vista or 7
    • Processor:Core 2 Duo
    • Memory:3GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:4 GB HD space
    Recommended:
    • OS:Windows 8 or 10 64 bit
    • Processor:Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:6 GB HD space
    Minimum:
    • OS:Lion (10.7)
    • Processor:Intel
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:4 GB HD space
    Recommended:
    • OS:El Capitan (10.13)
    • Processor:Intel Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:6 GB HD space
    Minimum:
    • 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
    Recommended:
    • OS:Ubuntu 14.04
    • Processor:Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:6 GB HD space
Customer reviews
Customer Review system updated! Learn more
Recent:
Very Positive (577 reviews)
Overall:
Overwhelmingly Positive (30,542 reviews)
Recently Posted
Munkeylord
( 381.3 hrs on record )
Posted: June 30
One of the best games I've played. One minute detail that you forget or don't check can cause a slight catastrophic issue. There is not enought land mass on kerb in for the kerbal grave yard
Helpful? Yes No Funny
Jebediah Kerman
( 562.8 hrs on record )
Posted: June 30
Played it a bit, it was ok.
Helpful? Yes No Funny
pigman37
( 67.2 hrs on record )
Posted: June 30
m8 i r8 8/8 would play again IGN 10/10
Helpful? Yes No Funny
Dravin
( 240.9 hrs on record )
Posted: June 30
- Played hundreds of hours of KSP.
- Move on to other games.
- Come home drunk one evening.
- Decide to rescue Marsha Kerman from orbit of the Mun
- Plan, design launch and succeed mission while drunk.
- Wake up next morning.
- Find Marsha Kerman safe at Kerbal Space Centre.
- WTF.
- Slowly remember.
- ...
- Profit!
Helpful? Yes No Funny
Sir Robert
( 180.2 hrs on record )
Posted: June 30
I bought this game after trying the demo and having a lot of fun with it. I've played KSP off an on for a few years. The game has a very active mod-making fan base and this opens up a lot of new avenues for play. My best review of this game is anecdotal. (I sent this to a friend when I was only a few hours into play. I had no mods installed and was still very much learning the basics. Anyone who plays KSP might find this story relatable.)

"One of my test flights put 3 Kerbals into orbit. They were low on fuel so I did a retrograde burn to bring them home. Except that I didn't do a retrograde burn, I did a prograde burn. By the time I realized it, I had burned too much fuel to get them home. I reduced their orbit as much as possible, even using all available monopropellant from the thrusters. They were stuck in an elliptical orbit over 100km from the surface at their lowest point. With no way to return to the surface under their own power, I had one option; a rescue mission.

I built a new ship, one with sufficient fuel to achieve orbit and maneuver to intercept the lost ship which I dubbed "Lost Eagle." Lost Eagle had been fitted with docking collar and I guess that was just fate because it was now my goal to use that in the rescue effort. The rescue craft went through several iterations and multiple aborted attempts at rescue. The final design of the craft contained a single seat cockpit and a 4 seat hitchhiker pod which was used for it's relatively low weight. This would end up being the ultimate design flaw. It was my goal to grab the 3 stranded crew members, and transfer the rescue pilot to the pod before re-entry.

Docking is hard. I would say impossible but I've seen videos of people doing it and I know it can be done. But despite many hours and multiple misses. I had got Rescue 1 and Lost Eagle lined up next to each other about 200 meters away. I closed enough distance that I felt it would be close enough to 'jump.'

The first crew member from Lost Eagle jumped from his old ship to the new one. It went pretty smoothly, but in the process the ships drifted further apart. I did a corrective burn on Rescue 1 to get them closer together and jumped the second crew member. Success again. 1 left. He jumped, this time from the furthest gap. He too arrived successfully. I felt a rush of success, a feeling of accomplishment frequently lost in today's video games. Plenty of fuel for the retro burn. They were coming home. This process had taken hours and this was the payoff that would make it worth while.

The design of the re-entry craft was basically a can that held 4 crew with 4 radial parachutes coupled to a single seat inline cockpit with a shielded docking collar on the tip. She wasn't pretty, but she was light and efficient. The plan was to transfer the pilot to the reentry craft before they hit atmosphere, but I had discovered that I couldn't deploy the parachutes from the re-entry craft. It was a problem I had known about since earlier iterations of the craft but I was willing to work around the problem by deploying the chutes without decoupling the cockpit. The whole thing still landed successfully in my tests.

At 5000m above the surface, having survived re-entry. I pressed the spacebar to activate the chutes. I don't know if I double tapped it or if I had just had my staging backwards, but when I hit the space bar the cockpit split off from the hitchhiker can. Knowing full well that there was nothing I could do to save the pilot of Rescue 1 I watched in horror for a second as it hurtled to the ground with no possibility of survival. I quickly switched to the other part of the ship. I tried manually clicking on the parachutes to deploy them. The hitchhiker module contains nothing but chairs. No controls that could be used to deploy the chutes. Again I watched in horror as the 3 rescued kerbals hurtled towards their doom, the exile in orbit seeming to be safe alternative to the instantaneous death that awaited them at hundreds of meters per second.

The game would have let me revert to the launch of the mission, or even the assembly area where I could have redesigned the rescue craft that had doomed these 4 brave kerbals. I chose not to. I was angry at myself for the mistake. I had invested so much time into this and laziness had prevented me from fixing what I knew was a flawed design. The empty ship, Lost Eagle remains in its orbit a floating monument and constant reminder to any Kerbal that looks up, that taking the easy path or acting haphazardly can have terrible results. I will be reminded of this every time I play the game."

Helpful? Yes No Funny
JBeahn
( 16.7 hrs on record )
Posted: June 30
As someone who works for the American Space Program, I definitely qualify as a rocket-geek (I also work at the real KSC). This game fits wonderfully as both a game and a simulator. The physics simulation is top notch. And the game aspect and humor make it all the better. Please keep working to kick it up another notch, but as is I cannot recommend it enough!
Helpful? Yes No Funny
ArononymouS
( 1,156.7 hrs on record )
Posted: June 30
This game has one of the steepest learning curves of any game i've ever played, but it has also given me the greatest feeling of achievement from any game i've ever played.

When you land on the Mun for the first time, after mashing buttons trying to stabalise your craft and you barely make it due to the lack of fuel, there's no better feeling than knowing you have to do it all again and launch a rescue mission. (or you could just leave Bob there for science).....

I am a big fan of space, physics and science in general and playing this game has been an education for me. Because of KSP I have watched dozens of YouTube videos on astrophysics and aerodynamics I would have probably never watched without this game and learned a ton of interesting things, and i love that.

The game has a fantastic modding community with a huge variety of mods to add realism or give your game a futuristic sci-fi feel. A favourite mod of mine is 'Remote tech', I don't play without it.

This game produces some stunning visuals too as you drift through the vast openness of space, orbiting moons, chasing asteroids, collecting science and designing planes, rockets, trucks, rovers, probes, boats even helecopters and mech walker/transformer type sh** thanks to mods...

If you ever look up at the stars and wonder what it would be like to go there..... Well, this is as close as i'm ever gunna get.
Helpful? Yes No Funny
GRINDCORE
( 1.0 hrs on record )
Posted: June 30
Don't let my play time fool you, i have been playing kerbal since the day it was released, only just decided to buy it on steam. KSP is like no other simulator out there, the attention to detail, the physics, the mods, the humor, this game has it all. If you're a fan of space, exploration, building and a genuine sense of accomplishment than you should give KSP a try, i won't lie, there is a steep learning curve but a few hours in and you should be able to figure most of it out. That being said, it's not for everyone as it's the type of game where you have to use your brain to succeed, so if you're an idiot, i would suggest you keep to MOBAS.
Helpful? Yes No Funny
tabouwski
( 528.4 hrs on record )
Posted: June 30
With gametime over 500 hours I thougt I should write a review. I've had this game since it was an early access game, and I still enjoy it a lot. Some mods should be essential such as "Renaissance Compilation", it makes the world a lot more realistic and enjoyable. It is difficult for everybody the first time, but with some practise you'll gain experience beyond your imagination. I was so proud the first time I landed on the mun that I snapchatted my friends even if it rolled over to the side. Now I am a quite experienced player and I think almost everything feels too easy. So don't refund the game just because it is hard.
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
145 of 155 people (94%) found this review helpful
71 people found this review funny
Recommended
15.6 hrs on record
Posted: June 3
This is Major Jeb to ground control
I'm stepping through the door.
And I'm floating in one of the most peculiar ways.
And the stars look very different today.
~10/10, great game.
Was this review helpful? Yes No Funny
92 of 109 people (84%) found this review helpful
111 people found this review funny
Recommended
13.1 hrs on record
Posted: June 1
- Launched into space.
- Climbed outside to get science.
- Accidently let go.
10/10 would burn in atmosphere again.
Was this review helpful? Yes No Funny
56 of 62 people (90%) found this review helpful
8 people found this review funny
Recommended
112.1 hrs on record
Posted: June 6
So i told myself when i reached 100 hours on this game i would write a review. Well, here i am.


So i got this game around summmer 2015, after wanting it for a long time.
The game had just left early access and was in beta. (I just want to point out that i am very attatched to this game)
I adore this game. Most of my summer was spent playing this. (Before you say that isn't possible, i would like to point out my hours didn't add up as I ran the game from the .exe rather than steam.)

I would, and have, recommend this game to anyone who enjoys the feel of success, science, exploration, engineering, space, cute green creatures who you shall become the merciless god of as you stack them on top of each-other and use them as landing gear.

The only slightly bad thing about this game is the learning curve. I know the 1.1 update added loads of tutorials, 'cuz the old ones were exeedingly bad, but you will spend around 5 - 10 hours before you can do anything useful. Needless to say though it is worth it, and soon you will conquer the solar system!

Or, y'know, just abuse the various bugs the game has... that's cool....

Anyway, thanks for reading this review. If it helps someone buy the game, or spread the word, or anything, then i'm glad.

-- Simple Concept
Was this review helpful? Yes No Funny
59 of 69 people (86%) found this review helpful
89 people found this review funny
Recommended
987.2 hrs on record
Posted: June 3
Picked up a copy during its early access, have been in love with it since.
Was this review helpful? Yes No Funny
23 of 23 people (100%) found this review helpful
1 person found this review funny
Recommended
841.6 hrs on record
Posted: June 14
This is one of my favourite games. Its simply amazing.

KSP is walking the fine line between a space sciency simulation and a comicly slapstick just for fun and giggles game.

Its harsh and unforgiving in the beginning, expecting you to know about the basic science of rocketry or fail over and over until you get it on your own. (Watch ScottManley tutorials if you want a head start)
I had trouble in the beginning even getting into orbit around the planet (or keeping my rocket upright on the way there) - but now I am planing missions to other planets, landing and returning - sending unmanned rovers to explore - or even bringing asteroids back home.

800 hours in and I feel like I am still just at the beginning.

»Mün or bust« - unknown (prob. Jebediah Kerman or KurtJMac)
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36 of 45 people (80%) found this review helpful
2 people found this review funny
Recommended
68.8 hrs on record
Posted: June 7
This is without doubt the best game i have played.
Was this review helpful? Yes No Funny
9 of 9 people (100%) found this review helpful
Recommended
120.1 hrs on record
Posted: June 9
What starts out as a simple, often hilarious; almost lego-like rocket/spaceplane builder has an astounding depth when you look into the possibilities.

The game features a great incentive for advancing your ambitions, science. Science is spent on new technology and parts for bolder missions, and is earned by pushing your boundaries. First, you can explore around you. Take samples, and crew reports from your cute crew of little green simpletons, then maybe you take a simple rocket to outer atmosphere for the first time, take a crew report and get home alive with a nifty parachute.. and Bam! More science. A new part, and the plot thickens..

KSP begins as a goofy tinkering tool with rockets and develops into a full-blown space exploration and research SIM.
Getting a rock sample from the moon may be one of your hardest gaming achievements, as it was for me, but doing it brings reward like little else. The planning, the development and trial/error makes KSP a great learning tool. It's even NASA approved. It uses real world physics and simulated drag for winged aircraft. It uses realistic orbital-mechanics for planitary manuevers, and players use realistic many real-life elements mission planning.

Buy it for your kids, buy it for yourself. They'll enjoy goofing and experimenting; they might even get serious about it. Same goes for you; you will enjoy at least a few experimental flights/missions. Especially if they end in a giant explosion, as many early flights will. After that you might have a success or two, maybe a simple contract or research mission turns out to be easy and you start learning. Soon you'll have dreams of the stars.

*****
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9 of 12 people (75%) found this review helpful
10 people found this review funny
Recommended
1.0 hrs on record
Posted: June 23
Nuked the polar caps and no climate change.

Checkmate lefties.
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5 of 5 people (100%) found this review helpful
1 person found this review funny
Recommended
277.6 hrs on record
Posted: June 25
270 hours in the game, still can't land on the Mun. 10/10
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5 of 5 people (100%) found this review helpful
Recommended
550.6 hrs on record
Posted: June 25
I bought this game a long time ago. I still beleive it was well worth the money. I have yet to explore the whole solar system yet alone the galaxy. (VERY good mod support via CKAN) Oh, and it is also one of the most educational games ive ever played. taught me more about physics than my entire highschool physics class =) The only negative I can think of, is the insane learning curve. Many people need to spend hours just figuring out how to get into their first orbit. But that is just one of the things that you must be willing to do in KSP. Aside from that, very highly recommended.
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