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 (491 reviews) - 93% of the 491 user reviews in the last 30 days are positive.
Overwhelmingly Positive (31,188 reviews) - 97% of the 31,188 user reviews for this game are positive.
Release Date: Apr 27, 2015

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Recent updates View all (34)

September 13

Update 1.2 Pre-release is here!

Hello dear Kerbonauts!

Update 1.2 has finished its Experimentals phase and we’re excited to announce the launch of the Public Pre-release.

During Experimental testing a small team of experienced KSP players threw everything they’ve got at the game in order to help us catch as many bugs as possible, so that we could make the game as stable as it could be. Now we’re proud to say that’ve come to the point where we can finally release the open test build.

This ‘pre-release’ test build is for everyone to have a go before we officially released the update and you’ll be able to opt-in to get the Pre-release builds via the Steam betas, or, for the first time ever, through the KSP Store. Naturally, you’ll need own a copy the game beforehand in order to access these builds. This opt-in branch will run for a minimum of two full weeks before the release date of the final update (the final release date hasn’t been closed, so changes may occur).

To facilitate discussions of the Pre-release branch we’ll be opening up a temporary sub-forum for feedback. Additionally, a Pre-release project will be made available on the bug tracker to report bugs on.

Furthermore, we want to help the modding community by making the modding API public. Click this link and enjoy!

Finally, and as promised, you can get Porkjet’s awesome rocket parts package files here .

We’re almost there and we couldn’t be more excited. Stay tuned for updates and happy launchings!

205 comments Read more

September 5

Update 1.2 has entered Experimental testing!

Hello Kerbonauts!

Update 1.2 has just entered Experimentals! We’re eager to finally start the next phase of testing and getting ever closer to the 1.2 release.

During experimental testing a crack team of experienced and hand-picked KSP players will throw everything they’ve got at the game to make it bend, blend and break in many ways. The goal is to catch as many bugs as we can, and to make the game as stable as it can be before we make a public test build available.

Those of you who’ve been around for the 1.1 update will remember that we released a ‘pre-release’ test build for everyone to have a go before we officially released the update, and for update 1.2 we plan to do the same thing. Once the pre-release builds are available you’ll only be able to opt-in via the Steam betas, or through the KSP store.

We hope you’re as excited as we are about the coming weeks. Stay tuned for updates and Fly Safe!

207 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
Customer Review system updated Sept. 2016! Learn more
Very Positive (491 reviews)
Overwhelmingly Positive (31,188 reviews)
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24,884 reviews match the filters above ( Overwhelmingly Positive)
Recently Posted
182.7 hrs
Posted: September 27
Great game! but the frames when building something massive is still unbearable even in 1.2 so yeah, everything else is a 9.5 out of 10 .
Helpful? Yes No Funny
159.4 hrs
Posted: September 26
Don't buy this game.

In all seriousness, find some way to play it without buying it first so you can work out whether you're going to enjoy/be frustrated with it or not before you spend/waste money on it. 160hrs of playtime, and it feels like 150hrs of that were nothing but frustration, annoyance, restarting, taking wild stabs in the dark, and getting nowhere. I'd ask for a refund if I could.

This isn't to say it's a bad game, but it's NOT a fun game unless you're willing to spend hours working out how to do some of the simplest things while getting more and more frustrated because you don't understand what's happening, or have things go wrong for no reason.

The game itself won't tell you what's happening, what you're doing, what you should be doing, or why. The game won't tell you if you could be doing things better or how. It won't congratulate you for doing things wrong OR right, has no 'goal' other than what you set for yourself, is an INCREDIBLE bore and waste of time INTENTIONALLY, at times. There are so many negative aspects to actually playing the game that they start to all mesh together after a while.

At the same time, it can be fun. And if it turns out to be your sort of thing it's DEFINITELY going to be fun, because it's got a sort of cheery feeling to it, and a sense of accomplishment.

It's just that there's a lot of 'but's attached to any sort of enjoyment of the game.

So try it first, and not the incredibly cut down demo that doesn't really show you anything, or the YouTube channels where people who know every little thing about the game show you how easy it is for THEM to play it, and make up your mind before spending money on it.

And be prepared to be disappointed. It's just that sort of game.
Helpful? Yes No Funny
306.0 hrs
Posted: September 26
Kerbal Space Program is a game that my children, and their children, will play. KSP will be written in the history books. KSP is life. KSP is God.

Right now I don't feel like writing a large and super detailed review so just take my word that this is a damn fine game, unparelled I should say.

Let's just say that, after playing KSP for the hours that I have, I can confidently take charge of NASA and launch hundreds of space missions...most of them would result in many Kerbal deaths. Now that I think abouut it, I should probably reevaluate my skill level.

But in all seriousness, stop reading my review and buy it. You can try the demo but it's outdated. I bought this, after I played the demo, and the game wasn't even on sale.

Constant updates, since the release of KSP, constant bug squashing, and complete dev team dedication.

So it already!

If you are reading this sentence, that means you haven't bought it. Can you stop reading this and go back to the store page? Seriously stop reading these words and purchase the game.

Your welcome and thanks for reading!
*launches celebratory rockets, kills dozens of Kerbals*

Helpful? Yes No Funny
219.5 hrs
Posted: September 26
Put rockets on stuff and hit launch. Enjoy fireworks 8.7592367421/10
Helpful? Yes No Funny
239.7 hrs
Posted: September 26
Well, Where to start? Ever feeled like you want to discover the universe, desorbiting huge masses, walk on fairly far away moons and kill all of your crew multiples times before accomplishing it? Here is for you Kerbal Space Program!
Helpful? Yes No Funny
13.4 hrs
Posted: September 26
Needs Work Shop mods & posting space crafts...

Overall 5/10
Helpful? Yes No Funny
Barry Lyndon
935.6 hrs
Posted: September 26
Lasts a thousand hours with all possible mods (especially Realism Overhaul/RSS) and then you curse the devs because each update takes a year to come out, uses its player base of QA and just adds a flawed career mode (0.90), mod functionality (Deadly reentry, Kethane, Procedural fairings in 1.0, Remote Tech and Scansat in 1.2) without fixing performance/bugs.

Also a rocket taller than 20ft is just like a giant space noodle and it is very fun indeed 10/10 'moar struts xDxDxD'

Basically the game is garbage without mods. Go get them and ease your pain.
Helpful? Yes No Funny
124.0 hrs
Posted: September 26
This game is one of the best tests of the mind you could put yourself through, both in terms of creativity and patience. Amazing game, but not too much play time for the faint of heart.
Helpful? Yes No Funny
26.5 hrs
Posted: September 26
Time for me to achieve:

Orbit around Kerbin: 12,3 h

Fly-By of Mun + Safe return: 24,7 h
Helpful? Yes No Funny
47.3 hrs
Posted: September 26
A very fun and intriguing game.
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
70 of 75 people (93%) found this review helpful
61 people found this review funny
43.5 hrs on record
Posted: September 4
A wise man once said:

"If at first you don't succeed, add more mainsail thrusters."

This man was correct.
This man was me.
Was this review helpful? Yes No Funny
74 of 87 people (85%) found this review helpful
43 people found this review funny
478.5 hrs on record
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.
Was this review helpful? Yes No Funny
48 of 50 people (96%) found this review helpful
37 people found this review funny
296.5 hrs on record
Posted: September 1
Top 5 things that taught me orbital mechanics:

5. Apollo 13 (1995, Tom Hanks, Bill Paxton, Kevin Bacon) ~$13 []

4. Highschool Physics (Newtonian Mechanics) ~Free [Australian Education System]

3. Undergraduate Physics Degree (Keplerian Motion, One body mechanics) ~$8000 /year [UQ]

2. Postgraduate Physics Degree (Analytic two-body solutions, computational Runge-Kutta simulations) ~$10000 [UQ]

1. Kerbal Space Program ~$30
Was this review helpful? Yes No Funny
33 of 38 people (87%) found this review helpful
25 people found this review funny
6.3 hrs on record
Posted: September 5
Launched rocket; watched it explode.
Made adjustments and launched rocket; watched it explode.
Made more adjustments and launched rocket; landed it successfully. Watched science explode.

10/10 Michael Bays.

You should definitely buy this game if you like physics and explosions.
Was this review helpful? Yes No Funny
54 of 74 people (73%) found this review helpful
69 people found this review funny
23 of 24 people (96%) found this review helpful
15 people found this review funny
297.7 hrs on record
Posted: September 13
Nothing will prepare you for the moment you first touch down on the Mun with your Kerbals - alive. The sense of accomplishment is magnificent.
Its probably comparable to the crushing defeat you feel as you realize you forgot to make sure you had enough fuel to get back home.
But! You've done it! You managed to get your Kerbals to the Mun, land them safely, lift off and get into an aerobrake orbit around Kerbin!
Aaaand, you forgot to put parachutes on your command pod :|
Was this review helpful? Yes No Funny
13 of 16 people (81%) found this review helpful
11 people found this review funny
120.3 hrs on record
Posted: August 29
I spent 120 Hours on this game so far, and all i could achieve was crashing on the "Mun" and killing my Crew.
Was this review helpful? Yes No Funny
9 of 10 people (90%) found this review helpful
3 people found this review funny
43.6 hrs on record
Posted: August 28
KSP is a game in which you run a space center, build spacecrafts, launch them and fly them to explore the Kerbin system.

Your space empire could be built on a plethora of crew sacrifice, and it will be tedious process to learn to fligth freely. But nothing could bring you so much sense of achievement than standing on the soil of other celestial objects. Only the most intellectual and hardworking one will be awarded.

The most attracting portion of this game is building mindblowing spacecrafts and flying them in the space. When you play in career mode, you will have to consider whether it could fly your crew members back to Kerbin safely and whether you could afford it. Every spacecraft is a essense of your mind and your knowledge about astronomy, physics, aerodynamics, etc.

10/10 Play this game and kill Jedebiah again!
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5 of 5 people (100%) found this review helpful
4 people found this review funny
261.2 hrs on record
Posted: September 16
Harder than dark souls.
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3 of 3 people (100%) found this review helpful
44.5 hrs on record
Posted: September 21
As goofy as the game seems, you will NOT find a more in depth and accurate space flight simulation out there yet.

At first, it's fun to build explosive and cobbled together monstrosities to launch into space and send crashing back to the ground, but then you learn the basics. Then suddenly a successful Mun landing becomes a point of pride and the next planet over becomes your new goal.

The career mode starts you with simple parts, to be expanded through scientific discoveries and contractual financial incentives.

Jebediah recommends this game to anyone worth their salt in a tin can floating among the stars.
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