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:
Overwhelmingly Positive (699 reviews) - 95% of the 699 user reviews in the last 30 days are positive.
Overall:
Overwhelmingly Positive (30,666 reviews) - 97% of the 30,666 user reviews for this game are positive.
Release Date: Apr 27, 2015

Sign in to add this item to your wishlist, follow it, or mark it as not interested

Buy Kerbal Space Program

SUMMER SALE! Offer ends July 4

-40%
$39.99
$23.99
 

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.

182 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:
Overwhelmingly Positive (699 reviews)
Overall:
Overwhelmingly Positive (30,666 reviews)
Recently Posted
Mr Scimples
( 24.3 hrs on record )
Posted: July 2
"Conquering Space Was Never This Easy"

I don't want to conquer space for real if this is the easiest way.
Helpful? Yes No Funny
I like trains
( 255.2 hrs on record )
Posted: July 2
Amazing. Just amazing.
Helpful? Yes No Funny
BUDGIE!!
( 177.2 hrs on record )
Posted: July 2
This is one of the best games on steam(after Half Life 2) with the steepest leaningcurve, the game just says slap some sh*t together, pick a crew, put it onto the launchpad and press the space bar.
And that was about all that the game told you before 1.0.
And it's 64 bit so mods are welcome :D

110/10 would like to chrash again.
Helpful? Yes No Funny
Usuallyfaded
( 80.1 hrs on record )
Posted: July 2
Bought this on my alt account just to show devs love twice. amazing game!!!!!!!
Helpful? Yes No Funny
Pyro
( 262.1 hrs on record )
Posted: July 2
Best space ship/flying game out there
Helpful? Yes No Funny
Jebadiah
( 1.6 hrs on record )
Posted: July 2
I share my name with the main character 10/10.
Helpful? Yes No Funny
예비 탄약
( 35.0 hrs on record )
Posted: July 2
Its a historically accurate representation of the USSR's efforts to get to the moon
Helpful? Yes No Funny
Langolier
( 710.6 hrs on record )
Posted: July 1
This game is a lot like an erectile-dysfunctioned ♥♥♥♥♥: it takes a lot of effort and can get quite hard, but the ride is well worth the wait.
Helpful? Yes No Funny
jakealz7
( 199.3 hrs on record )
Posted: July 1
I cannot reccommend this enough. Infinitely addiction and rewarding. Only play if you are prepared for the severe learning curve, but once you are through the learning curve it is one of the most rewarding games you will ever play.
Helpful? Yes No Funny
Blobby Tiger
( 179.5 hrs on record )
Posted: July 1
I may not the greatest at this, but holy hell is it fun.
If you have money: buy it.
If you have no money: get a loan then buy it.

10/10
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
245 of 279 people (88%) found this review helpful
146 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
106 of 116 people (91%) found this review helpful
15 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
86 of 102 people (84%) found this review helpful
93 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
41 of 43 people (95%) found this review helpful
2 people 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)
Was this review helpful? Yes No Funny
42 of 45 people (93%) found this review helpful
28 people 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
Was this review helpful? Yes No Funny
47 of 60 people (78%) found this review helpful
3 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
19 of 19 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.

*****
Was this review helpful? Yes No Funny
41 of 58 people (71%) found this review helpful
61 people found this review funny
Recommended
1.0 hrs on record
Posted: June 23
Nuked the polar caps and no climate change.

Checkmate lefties.
Was this review helpful? Yes No Funny
19 of 20 people (95%) found this review helpful
1 person found this review funny
Recommended
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.
Was this review helpful? Yes No Funny
8 of 8 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.
Was this review helpful? Yes No Funny