Kerbal Space Program is a multi-genre game where players create their own space program.
User reviews: Overwhelmingly Positive (13,547 reviews)
Release Date: Mar 20, 2013

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Note: This Early Access game may or may not change significantly over the course of development. If you are not excited to play this game in its current state, then you may want to wait until the game progresses further in development. Learn more

What the developers have to say:

“KSP is still under development. This means the game will be improved on a regular basis, through updates that add new features, content and bug fixes, so make sure to check back for new versions.



The game is being built as a sandbox first, so there are no objectives yet, but we want you to try it out and have fun with it already. You're free to build anything you can think of, and there is an entire Solar System to explore.



During development, KSP is available for purchase at a discounted price, which will gradually increase up to its final retail price as the game nears completion. So by ordering now, you get the game in its current state, and you'll get all future updates for free.”
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Recommended By Curators

"Do you like making things go fast? Is "this obviously needs more rockets" something you say on a daily basis? Then get KSP and launch some Kerbals!"

Recent updates View all (14)

October 7

Kerbal Space Program: Economic Boom is Now Available for Download!



Kerbal Space Program, the award-winning, indie space agency sim game from Squad, released its latest update, Economic Boom, and it is available to play today.Updates are free to existing players. KSP: Economic Boom offer new players the most fully-realized version of the game, which is still in active development for PC, Mac and Linux as an Early Access title on Steam and via the game’s website.

Players will experience a new challenge as the Kerbal Space Center, where players build and launch their rocketships, is now fully destructible. Buildings can be decimated by poorly-steered rocketships and in the game’s Career Mode, require costly repairs for players trying to manage their space agency.

Among these buildings is the new Administration Facility, in which players can select and activate Strategies. The Strategy system is a new gameplay mechanic, where each strategy, once accepted, applies effects over several game aspects, specifically Kerbal Space Program’s three in-game currencies, Funds, Reputation and Science. Some examples include:

  • Aggressive Negotiations: Enables players to get a discount on the cost of parts but at a cost to Reputation on each ‘discount’
  • Open-Sourced Technologies: Divert Science earnings to make them public domain, increasing Reputation.
  • Unpaid Intership Program: Boost your Science earnings without spending any Funds by hiring unpaid interns to do the data crunching. Working for the Space Program surely is its own reward, isn’t it? Well, as long as an agency’s Reputation lasts that is.

Career Mode is getting a significant addition with the Administration Building and all that comes with it,” Felipe Falanghe, Kerbal Space Program creator and lead developer said. “The Strategy system gives players great freedom to change the rules around, and ultimately it allows them to tune the game to fit their own ways of playing. Also, as it’s fully moddable and new strategies can easily be added, this new feature has a lot of potential for expansion.

The team also worked with modder, Christopher “PorkJet” Thuersam, to incorporate his popular SpacePlane+ parts pack mod to the game. This was more than a simple addition however: Each part was updated for even better looks, and to offer players parts that are there not just specifically for spaceplanes, but that can be used in as many combinations as possible.

The game is now available for 40% off on STEAM and the KSP STORE.

133 comments Read more

July 25

0.24.2 Hotfix Patch Released

Hi again,

I'm sure most of you have noticed a mildly infuriating bug related to right-clicking parts after yesterday's patch... So did we. It was fortunately a simple fix, and we've got a hotfix patch available now.

Here's the changelog:

============================ First Contract (v0.24.2)

HOTFIX:

* Fixed a critical issue which prevented opening the right-click menus for several parts.


As always, the latest version is available on the download page at the KSPStore, or an automatic update will be headed your way if you're on Steam.

Happy Launchings,

Cheers

54 comments Read more
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About This Game

Kerbal Space Program is a multi-genre game where players create their own space program.


In KSP, you must build space-worthy craft, capable of flying your 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 is being built first as an open sandbox, you're free to build anything you can think of, and fly it wherever you want, even into orbit and out to other planets and moons throughout the Kerbal Solar System. The first draft of the career mode is also available now, it is still in development, so expect more features!

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.

Planned Features


  • Take on Missions to attract interest in your Space Program.
  • Discover new worlds and expand the scientific knowledge of Kerbalkind.
  • And a whole lot more!

System Requirements

PC
Mac
Linux
    Minimum:
    • OS:Windows Vista
    • Processor:Core 2 Duo
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:1 GB HD space
    Recommended:
    • OS:Windows 7
    • Processor:Core i3
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space
    • OS:Snow Leopard
    • Processor:Dual Core Intel
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:1 GB HD space
    Recommended:
    • OS:Mountain Lion
    • Processor:Core i3
    • 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
    Recommended:
    • OS:Ubuntu 14.04
    • Processor:Core i3
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space
Helpful customer reviews
95 of 102 people (93%) found this review helpful
218.3 hrs on record
Early Access Review
Some say the main character isn't afraid of anything, except small insects. And that he once made it to the Mun with his eyes closed. All we know is: he's not the stig, but he is Jebediah Kerman!

This game has exerything you want in a "space race" game. You have explosions, the ability to build the best spacecraft you can comprehend; and best of all, you have raw power.

You may first get it and think, "what was I thinking when I got this, it's more difficult than becoming friends with Piers Morgan!" With that, you would be correct, but what you need... is to practice with many many crafts to get the right ideas.

The controls are like some kind of madness that would drive you away, but it's very easy to understand after you play for a bit.

All in all, I must say: this is one of the best games... in the world, and even out of it. If you wanted to pick this up for a mere 27 dollars (17 Quid), you would have to be mentaly insane to not get it.

And on that bombshell, back to the studio.
Posted: September 29
Was this review helpful? Yes No
46 of 46 people (100%) found this review helpful
624.0 hrs on record
Early Access Review
Imagine the most intricate, accurate to life space vehicle simulator you can. Dozens of toggle switches, displays ranging from the strange and esoteric to the vague and incomprehensible, buttons flashing angrily at you and daring you to press them. The screen shakes and aside from the roar of liftoff, the only thing you can hear is your own labored breathing and the pulse in your ears. Do you have this picture in your head? Good.

Because KSP is nothing like that. Take parts, attach parts, launch parts, land parts, detonate parts, survive falling parts. KSP is learning through failure. Unless you go on Youtube and look up the Scott Manley videos, you are going to fail. You gonna fail bad. But it's okay. Failure is only data by another name. Bit by bit, you'll learn how to do things right. You'll realize that putting the engines under the tanks is probably a good idea. Putting the crew capsule in a place not likely to be burned or detonated is also probably a good idea. Parachutes seem like a logical choice, but what the heck, right? Maybe you just need a five hundred meter long crumple zone. Nobody's gonna stop you. That's the great thing, isn't it? You can put anything at all you want on the launchpad, and nobody knows well enough to try to stop you. The Kerbish OSHA rep is permanently locked into the bathroom. He's not gettin' out of there. We welded the window shut, locked the door, and put model airplane glue in the keyhole. Cell phone reception in there is sketchy. You're safe. So go nuts.

There's places you can go. Land at the poles, the sea, the mountains, or all three at once with a creatively timed spray of shrapnel. There's other worlds. A big burning thing with no surface that'll tan you for free if you check it out. It'll tan you to the bone. So that's a bonus. There's other worlds. Red world. Purple world. Green world with little worlds around it. Hidden stuff everywhere. All of these places are fit to seed with refuse. Landers, rovers, living quarters, stations, battleships, pasteboard furniture, lawnmowers, spaceplanes, robots, scooters, springboards, et cetera. KSP is a litterer's dream. There's so many places you can leave stuff you have no hope of bringing home. And it's worth doing it just to see that stuff sitting there.

But I've got to warn you. You've reached TL;DR level four, so here's a bonus. This game has very unexpected side effects. You will learn things. Hoffman transfer. Periapsis. Apoapsis. How orbit actually works. Why orbit is halfway to anywhere. Launch windows. Free transfer windows. Free returns. If you make the horrifying inadvertent mistake of buying this game for yourself or your child, somebody's gonna learn things. It's unavoidable. Real things, even. Newton's spectre haunts this game. You will find no escape, and he fears no earthly garlic.

Lemmie wrap this up for the TL;DR folks who check the bottom summary. Just get KSP already. You aren't really learning anything from my review you probably didn't know already. Let's be honest with each other, here. Ok? You don't want to learn whether or not this game is worth buying. You're looking for someone to make the excuse for you. You're already gonna get it, you just want someone to possibly take the fall for you if you catch heat for doing it. And to you, good sirs and madams, I say; Yes. Yes, I'll take the blame. "That fat idiot Whackjob from KSP told me to get the game, or he said he'd cut me." They'll believe you. You're good. So do it. Hit that buy button.

Thank me later.

~Whackjob of KSP
Posted: October 10
Was this review helpful? Yes No
23 of 27 people (85%) found this review helpful
603.4 hrs on record
Early Access Review
Best game on steam. It killed off my social life. 10/10
Posted: October 8
Was this review helpful? Yes No
14 of 15 people (93%) found this review helpful
147.4 hrs on record
Early Access Review
Tried to go to mun, hit WTC.

9/11
Posted: October 8
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14 of 17 people (82%) found this review helpful
8.9 hrs on record
Early Access Review
Can't even get a successful ship into orbit...

10/10.
Posted: October 15
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10 of 10 people (100%) found this review helpful
39.8 hrs on record
Early Access Review
Sent a guy into space and lost him
Sent a recon guy to retrive the lost guy...lost him in the process
Sent another recon squad to save the other two guys (they drifted to the sun over a period of 2 days, lost them)
Sent a one more guy to get the other two, before he could get there the others fell back to Earth and died.
No one made it back

10/10
Posted: October 2
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11 of 13 people (85%) found this review helpful
32.7 hrs on record
Early Access Review
Its like NASA but less NASA and more explosions
Posted: October 12
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11 of 13 people (85%) found this review helpful
363.7 hrs on record
Early Access Review
THE GREATEST GAME EVER!!!!
Posted: October 15
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9 of 10 people (90%) found this review helpful
68.6 hrs on record
Early Access Review
This is quickly becoming one of my favourite games of all time. There's a steep learning curve, but your reward for persistence is hours and hours of non-stop fun.

The developers constantly update the game with new parts, better campaign mode, and eventually new worlds to explore.

This is the best $25 youll ever spend.
Posted: October 13
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6 of 6 people (100%) found this review helpful
155.3 hrs on record
Early Access Review
♥♥♥♥ing 10/10
Posted: September 28
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7 of 8 people (88%) found this review helpful
13.1 hrs on record
Early Access Review
This game got me a job a NASA.
Posted: October 24
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5 of 5 people (100%) found this review helpful
670.9 hrs on record
Early Access Review
This is an amazing game! From the beginning, when only sandbox mode was avalible, to all the goodness we have now it has been fun the whole time. I look forward to the full release and seeing everything the devs add and meke even better.

This game is for you if, like me, you loved/still love to build with legos!
Posted: September 28
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4 of 4 people (100%) found this review helpful
13.7 hrs on record
Early Access Review
Kerbal Space Program offers an immense amount of tinkering away at spacecraft that fail and fly. Spending a few minutes slapping something together that barely gets off the ground can give some satisfying laughs. But when you've spent a good bit of time perfecting a craft and getting to the many milestones (getting airborne, breaking atmosphere, maintaining orbit, landing on The Mun) you'll have so much pride in yourself for accomplishing something that you'll feel like a rocket scientist. The physics at play in KSP can allow a previously failed launch to have a chance of succeeding next time so taking several attempts is rewarded (don't give up). Trial and error is what drives this game and if you love the idea of ironing out the wrinkles in your design and watching it pay off, then you won't be disappointed at all in KSP. Let your creativity and problem solving skills run wild!
Posted: October 7
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4 of 4 people (100%) found this review helpful
28.1 hrs on record
Early Access Review
A very fun and intuitive twist on space exploration, control every aspect of your own NASA. From finances to actually building the rockets and actually landing on the Mun (Moon) as well as various other planets, all the while mindlessly exploding Kerbals into great balls of fire. I would recommend this to anyone who enjoys tinkering and building stuff, as well as blowing it up.
Posted: October 8
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3 of 3 people (100%) found this review helpful
34.6 hrs on record
Early Access Review
Epic.
Posted: October 4
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5 of 7 people (71%) found this review helpful
160.3 hrs on record
Early Access Review
DAH, EEZ GUUD
Posted: October 10
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2 of 2 people (100%) found this review helpful
130.8 hrs on record
Early Access Review
Launched a beatiful rocket, after MANY trials, with my state of the art two phased "Orbital Refueler + Mun Lander" capable of collecting all the shiny science I could find. After a sucessions of careful maneuvers, landed almost on top of the lauching plataform. Everyone died on a horrible explosion because the little green engineers forgot to attach parachutes on the capsule. Top 5 moments of my gaming life. 15/10
Posted: October 7
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2 of 2 people (100%) found this review helpful
28.7 hrs on record
Early Access Review
not much to do in it so far, when you try to fly your ship it just breaks apart instantly, and that's pretty much it. Has a lot of potential for when they fix this issue though.
Posted: October 8
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3 of 4 people (75%) found this review helpful
471.3 hrs on record
Early Access Review
Best Space Simulation game ever! Hours of fun and you'll learn the basics of space travel and rocketry, As you join the Kerbals in exploring space take control of the space agentcy and you slowly devalope the space programe. Build and take full control of the rockets and crafts, build space stations and planetary bases, and bring you kerbanuts back alive.
Basicly it's a CRASH couse in Space and rocketry. two thumbs up and good for all ages. Fun and Educational.
Posted: October 16
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1 of 1 people (100%) found this review helpful
32.6 hrs on record
Early Access Review
amazng game 10/10
Posted: September 26
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