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) - 93% of the 566 user reviews in the last 30 days are positive.
Overwhelmingly Positive (31,527 reviews) - 97% of the 31,527 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.

337 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 (31,527 reviews)
Recently Posted
49.6 hrs
Posted: August 29
I need to stop forgetting that damn parachute...
Helpful? Yes No Funny
1.5 hrs
Posted: August 29
Feel kinda bad rating this game down, but it's a strange one! I'm first to admit I'm not exactly a smart one but wow this game is hard and confusing off the bat!
Also I like playing my games in fullscreen, I tried with this and it doesn't even run in 1080p, it's a weird resolution instead, not sure if I was doing something wrong. I have a £1,700 gaming laptop and I couldn't read any of the instruments on the game which I'm supposed to do apparently because the resolution was so bad!
If you're looking for something fun and not headache inducing I probably wouldn't get this...
Helpful? Yes No Funny
478.5 hrs
Posted: August 29
Better than No man's Sky - Derp
Better than Space engineers - Hardest call to make
Better than Starbound - Yeah I said it.
Better than Stellaris - was 50/50 but hey, kerbals rule.
Better than Factorio - you get to fly the damn rocket!

Would crash into the Mun for another 470+ hours.
Helpful? Yes No Funny
183.5 hrs
Posted: August 29
Just amazing, one of the most addictive games I have ever played. Got over 100+ hours and i know thats not much for some others players.

All i will say it 'The destination does not matter, its the stuggle, the journey that makes it worthwile'
Helpful? Yes No Funny
574.9 hrs
Posted: August 29
This game has to be my FAVORITE game of all time. It is the MOST realistic space exploration game on the market to date that involves more reality than most games ive seen, I play Space Engineers, and Take on Mars aswell (Im a space nut). And when it gets down to it Kerbal Space Program is the best game EVER when you combine it with friends using the Dark Multiplayer mod ( and do some serious space missions! If I could have my words read by the devs, I would like to recommend more reality settings be applied. I would like to see batteries lose their effectiveness and ability to take a charge over in-game years, more rocketry packs, and something to do AFTER we've landed on a planet/moon. I/WE run out of things to keep us immersed after we've landed other than collecting a soil sample for no reason, planting a flag, or just walking around. How about some basic quests? or allow Kerbals to craft Kerbal outposts or establish a new launch site there to get a further reach including intergallactic systems also to support that extension of reach and all the popular community built parts that we see in the mod market being officially supported (some of their creations are awesome and deserve your support!)
Helpful? Yes No Funny
575.9 hrs
Posted: August 29
I love it
Helpful? Yes No Funny
97.3 hrs
Posted: August 29
With the right mods its and exelent game, a litte bit more optimization would have be good.
Helpful? Yes No Funny
78.0 hrs
Posted: August 29
Helpful? Yes No Funny
106.0 hrs
Posted: August 29
Simply the most phenomenal game ever created.

You will fail. You will get frustrated. You will get angry. The learning curve in Kerbal Space Program is astronomical. It took me days of playing before I put my first craft into orbit. A week before I reached the Mun. A month before I mastered rendezvous and docking. Never once, however, was I ever bored. You are, after all, developing your own space program. One small step for man, one giant step for Kerbal kind.

You build, you launch, you fly, and you crash. You conduct SCIENCE and develop new rocket parts to build, and fly, and crash. And, eventually, in one moment, you sit back and take in the overwhelmingly divine view of your space station that took 30 launches and countless hours to create as the Sun comes across the horizon of Kerban and illuminates your incredible feat of engineering. It is then that you take in the full breadth of space exploration in the real world, and in one massive, clarifying moment, you applaud the scientists, astronauts, and engineers for their breath taking accomplishments in exploring our own solar system.

If you find yourself on the academic path to the space industry, you quickly realize how many parallels you can draw between Kerbal Space Program gameplay and the real world. Suddenly, you are more qualified than others around you to answer fundamental questions about space flight. Even more so than your colleagues that are studying the topic.

Kerbal Space Program is more than just a video game. It teaches you. I have never before, and probably never again will, encounter a video game that will help develop my skillset as an engineer. The intuition for space travel that this game has given me is unparalleled, and is more than any classroom can teach.

If you are in any college and have any intent on working in the space industry in the future, buy this game. Now.
If you are at all interested in space, buy this game. Now.
Helpful? Yes No Funny
42.4 hrs
Posted: August 29
I know I am not a rocket scientist, but with this game I can pretend to be! Astrophysics and gravitational sciences are actually fun to learn!
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
320 of 346 people (92%) found this review helpful
377 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
355 of 410 people (87%) found this review helpful
481 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
166 of 182 people (91%) found this review helpful
162 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
203 of 241 people (84%) found this review helpful
119 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
147 of 169 people (87%) found this review helpful
127 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
43 of 47 people (91%) 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
39 of 48 people (81%) found this review helpful
17 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
43 of 57 people (75%) found this review helpful
57 people found this review funny
218.2 hrs on record
Posted: August 1
Be Jebidiah Kerman
You cannot control your destiny
You ride rockets to infinity
and beyond you crash

Be Me
Build rockets that have no sense
Somehow it orbits
start the descent
heat builds
landing gear destroyed and lost to the inferno
deploy chutes
first chute gone lost in the flame
second chute holds but does not slow
third deploys
the last hope
hit the ground and the science pod explodes
but hey, Jeb is ok!
Was this review helpful? Yes No Funny
45 of 66 people (68%) found this review helpful
28 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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24 of 33 people (73%) found this review helpful
25 people found this review funny
139.9 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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