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 (439 reviews) - 94% of the 439 user reviews in the last 30 days are positive.
Overwhelmingly Positive (31,390 reviews) - 97% of the 31,390 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.

319 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 (439 reviews)
Overwhelmingly Positive (31,390 reviews)
Recently Posted
24.2 hrs
Posted: August 25
He, he, he, make vehicle, crash, kill crew, restart.
Helpful? Yes No Funny
24.4 hrs
Posted: August 25
Just a simple yet awesome game.Nothing wrong it...just great.
Helpful? Yes No Funny
89.7 hrs
Posted: August 25
Even the best laid plans come down to this...
please please please let me not smash into the ground and flatten like a pancake!
Helpful? Yes No Funny
517.2 hrs
Posted: August 25
I am one of those people who joined playing KSP after watching jacksepticeye play it(Started at .25). Back then, the game was fresh, simple, fun, and easily moddable. When I got into weapons mods, I enjoyed the game even more, and as the game developed closer to 1.0, it stayed the same. When 1.0 came out, I was happy when my mods updated, only to have the capability of using less mods than before. Now I am in 1.1.3, and not only are the mods stupid and complex, KSP has become the same. The aerodynamics, though more realistic, differ so heavily from the earlier versions(before 1.0) that for a time, all I could make were hyperedit-launched spaceships and tanks. I have mentioned mods a lot, and that is just because, though this game is quite enjoyable on its own, just like many good things, when you have a taste, you can't go back. I would recommend this game, but I would not recommend it with the intention of using weapon mods, since BDArmory is officially stupid and doesn't fully work. Some may be able to work without weapon mods, like the game was intended, but I cannot.
Helpful? Yes No Funny
422.3 hrs
Posted: August 25
Literly the best game in the history of the universe.
Helpful? Yes No Funny
34.6 hrs
Posted: August 25
Great sandbox game of getting to the mun(moon) and beyond
although it can get very challanging to reach anywhere without online help it is very satisfying too land on a planet and theres a fare lot of mods you can get not through the workshop though
Helpful? Yes No Funny
Almost Cthulhu
127.5 hrs
Posted: August 25
On the surface, KSP may look like a simple game about building, launching and crashing rockets, but by the time that you've managed to get something to land on Eeloo, you're probably fully qualified to work at NASA.

On a more serious note, this is an all round great game, for people who want to make explosions and people who want to engage in dangerous missions to distant planets alike. The art style itself is cartoonish, whilst maintaining a fair amount of realism. The UI is also very well designed.

Gameplay is fun, whether it's building a 200 part asparagus staged rocket, flying a bizarre ion powered SSTO or trying to get Jeb to the Mun using only an EVA suit. With the randomness of the game, even a routine mission to low orbit can be a disaster, keeping the game ftom getting repetitive.

My only complaints are going to have to be the chosen engine, which I can hardly complain about because a good Unity game will take full advantage of it.

I'd recommend this game to anyone who likes building things to destroy them, building things only to watch them destroy themselves, and building things which miraculously work.
Helpful? Yes No Funny
171.1 hrs
Posted: August 25
Iy tride 2 go 2 te mon bot Iy gott eten bey uh kracen
Helpful? Yes No Funny
13.1 hrs
Posted: August 25
IM IN SAPCE!!!!!!!!
Helpful? Yes No Funny
5.2 hrs
Posted: August 25
Don't it's completely impossible and the istructions are pointless, this is a waste of a good game as the manual reads 'take the thing we have never told you about before and add it to the thing we are just mentioning now' so you will have to go online to find out what it is and even then the description will be so vage you will still not be able to work it out.

Terrible, save your money.
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
78 of 81 people (96%) found this review helpful
88 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
74 of 80 people (93%) found this review helpful
39 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
48 of 51 people (94%) found this review helpful
51 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
27 of 28 people (96%) found this review helpful
27 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
23 of 23 people (100%) found this review helpful
30 people found this review funny
2,014.9 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
22 of 23 people (96%) found this review helpful
32 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
20 of 20 people (100%) found this review helpful
3 people found this review funny
28.7 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
18 of 19 people (95%) found this review helpful
4 people found this review funny
777.2 hrs on record
Posted: July 28
I have spent so much time on Kerbal Space Program. This is one game I keep coming back to after years of play. The sandbox nature of the game combined with the numerous parts available leads to endless possibilities for Rockets, Planes, Space Probes, Boats, Trucks, Cars, and really anything you can think of. Take the base game and add mods like Infernal Robotics and Tweakscale and you have so much more to do. Then add an additional 150 mods from CKAN and there is literally no end to what can be accomplished. 10/10
Was this review helpful? Yes No Funny
17 of 18 people (94%) found this review helpful
10 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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9 of 11 people (82%) found this review helpful
7 people found this review funny
91.8 hrs on record
Posted: August 2
Yay! I'm a rocket scientist now.
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