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 (629 reviews) - 93% of the 629 user reviews in the last 30 days are positive.
Overwhelmingly Positive (31,712 reviews) - 97% of the 31,712 user reviews for this game are positive.
Release Date: Apr 27, 2015

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Recent updates View all (35)

October 11

Kerbal Space Program update 1.2 “Loud and Clear” is now available!

Hello everyone!

Kerbals hit a milestone, they are now interconnected and they can hear you Loud and Clear! Let your imagination fly with new possibilities, build communication networks, control vehicles remotely and explore every inch of the Kerbol System in ways that weren’t possible before with this new update!

Kerbal Space program 1.2: Loud and Clear includes a broad range of improvements and features that will enrich the overall game experience, such as the introduction of CommNet and KerbNet, a rewrite of the Stability Assist System (SAS) that makes your launches more accurate and fuel efficient, an engine change from Unity 5.2 to 5.4, more tweakable options for many parts, a complete fuel system redesign, and much more!

Here are some of the highlights for this update:

Set up your own communications networks and have better control over your probes even when they cannot establish a direct connection. Link your probes back to Kerbin via an antenna to be completely autonomous and build relay networks for better science transmission!

Use satellites for reconnaissance purposes, scan the terrain below you, find biomes and anomalies, and place custom waypoints with a targeting interface.

Improved Fuelflow System
The Fuelflow system has been rewritten and now you have total control over how the fuel flows through your vessels!

Improved Wheels
The stability of Wheels has been greatly improved. Your rovers, wheeled vehicles will now turn and handle smoothly, making the overall driving experience more pleasant. Aircraft are also more stable, and all wheels have realistic load limits.

You can find the complete changelog here.

Kerbal Space Program 1.2 Loud and Clear is now available on the KSP Store and on Steam, and will soon be available on other third party platforms.

228 comments Read more

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!

366 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 (629 reviews)
Overwhelmingly Positive (31,712 reviews)
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25,247 reviews match the filters above ( Overwhelmingly Positive)
Most Helpful Reviews  In the past 30 days
235 of 274 people (86%) found this review helpful
233 people found this review funny
1,434.5 hrs on record
Posted: September 28
Just remember to eat and drink occasionally.
Was this review helpful? Yes No Funny
98 of 101 people (97%) found this review helpful
5 people found this review funny
469.6 hrs on record
Posted: September 25
Kerbal Space Program, at least to me is the king of simulation games. While I play numerous others (such as Farming Simulator) they don’t seem to hit every mark in that field. KSP, while challenging at first is the one that throws everything that happens in reality at the player, and force them to deal with it. While a game like Farming Sim only really requires you to keep an eye on fuel or some crops, KSP requires that you maintain a healthy supply of necessities ranging from fuel and electricity, to a satellite connection back home. But the part of the game that truly shines is the feeling you get when you first land on the Mun. A friend who gave the game a shot said
“it was just...pride. So many Kerbals died in previous attempts, and I finally made it.”

While the game is difficult, I can’t stop asking people to try it. To me, it’s the perfect “life isn’t about the destination, but the journey” and I think this game captures that perfectly.
Was this review helpful? Yes No Funny
20 of 22 people (91%) found this review helpful
2 people found this review funny
119.6 hrs on record
Posted: September 25
If you have even a remote interest in space and space travel, buy this game. Seriously. It's worth it.

There's a learning curve but when you learn how to play, it's very satisfying and rewarding completing contracts and exploring the solar system.

There's a huge modding community as well so you can make the experience even better with Realism Overhaul & Real Solar System to get as close to real life rocket ships as possible. (+hundreds of other mods like SpaceX rockets and other real life rockets and engines and graphic improvement mods.)

Seriously, this is one of the best games I've ever played. The development team (SQUAD) is very active and transparent with the community.
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6 of 6 people (100%) found this review helpful
395.7 hrs on record
Posted: October 3
This is probably, my favorite game ever.
Its the only game that after a while I miss the ambiance, the music, the sounds and simply have to get back to.

I suck at it, its very hard to master (if its ever possible) but its simply great.

I could not recommend it more
Was this review helpful? Yes No Funny
5 of 5 people (100%) found this review helpful
1 person found this review funny
249.5 hrs on record
Posted: October 20
This is my most played game.

It has brought me the most pain.

The most anger.

At times I feel like I'm playing dark souls, in space, with adorable little green men.

This game has done so much for the future of astrophysics, these guys deserve global recognition for the excitement they have generated in new generations for space travel and exploration.
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4 of 4 people (100%) found this review helpful
1 person found this review funny
178.2 hrs on record
Posted: September 25
This game is amazing. There was a bit of a learning curve to figuring out the specifications needed for a space ship to reach its target, but with a little reasearch on orbital mechanics and rocket design, designing rockets became easier. It's such a satisfying feeling when you finally acomplish missions that took hours of hard work, I've even had to pull out the old pen, paper and FE approved calculator a few times while playing this game.
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4 of 4 people (100%) found this review helpful
1 person found this review funny
257.3 hrs on record
Posted: September 25
Ok, first step... Build rocket, watch it explode.
Second Step: Build rocket again, launch it, then watch it dive bomb into the ground/water/mountain....
Third Step: Build rocket again, launch it, make it to the upper atmosphere and discover you didn't bring enough fuel....
Fourth: Build rocket again, add more fuel, launch, and finally get it into orbit.....
Fifth Step: Pass out from high blood pressure attack from actually getting into orbit and finding out you don't have enough fuel to return to the planet....

Sixth Step: Look at the clock and discover you forgot to go to work, feed the cat, ect.
Seveth Step: Return to step 1.

Bloody love this game! I acutally have more hours than posted, as I play this game on my laptop while on the road, usually at night so that I'm all stressed out.

Now the Cons:

[ ] Steep learning curve, unless you have high understanding of physic's, math, your already an Astronaut.
[ ] An i5 Intel CPU (or AMD equal) or better recommended
[ ] Lots of memory and graphics memory
Was this review helpful? Yes No Funny
3 of 3 people (100%) found this review helpful
5 people found this review funny
514.3 hrs on record
Posted: September 30
You ever wonder what people mean when they say "It's not rocket science"?

Wonder no more.

This game is all about rocket science. Put in about 500 hours and when someone says "its not rocket science" to you, you can retort with "i know rocket science and im about to show you how much Delta V it takes to crush your kerbals with my boot."
Was this review helpful? Yes No Funny
3 of 3 people (100%) found this review helpful
725.5 hrs on record
Posted: October 7
Kerbal Space Program is truly something unique.

How do you market a game about rocket science -- the default analogy for "something extremely complicated" -- to an audience big enough to justify your budget? Well...there's a lot of little things that make it playable to many people.

First of all, it's a make-your-own-experience sandbox. Just like Minecraft (before there was an End), there's no final goal, no objective arrow. It's just you, an bunch of spaceship parts, a few kerbals, a custom solar system, the infinite expanse of space, and explosions. Lots and lots of explosions.

Second of all, this game about rocket science isn't about ALL of rocket science. There's quite a lot of liberty taken with the laws of physics, all in the name of simplicity. You don't have to worry about fuel flow, or life support, or the speed-of-light delay. All of that is benched in favor of less subtle things, like orbital mechanics, atmospheric shock-heating, and (look this up; it's practically KSP 101) delta-V and Tsiolkovsky rocket equation.

But here's the best part; all of these ignored facets of space travel can be added into the game. KSP has a very robust and active modding community, and I'm sure enough mods exist to make the game as realistic as you could possibly demand. Life support? There's a mod for that. Several, actually, in varying degrees of difficulty. Fuel flow? Part of Realism Overhaul. Speed-of-light delay? Check out RemoteTech. There are even mods that replace the stock solar system with our very own, real system, and even mods that add entirely new, dreamed-up systems. (I highly recommend starting out with no mods, then adding them as you become comfortable with what you already have.)

Really, Kerbal Space Program is great for the same reason Minecraft is great. It expects nothing in particular of you, it just wants you to do whatever comes to mind. If that means strapping a hundred boosters together as randomly as possible and watching the fireworks, that's fine. If that means methodically landing on every planet and moon one-by-one, that's fine. If that means brutally murdering your kerbals, well, heck, they're just as surprised to be alive as you are, so go for it.
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3 of 3 people (100%) found this review helpful
1 person found this review funny
1,433.5 hrs on record
Posted: October 13
It turned me into an 8-year old boy who just saw his first rocket launch. I had a birthday cake with rockets on it. It's easily the best game I've ever played, and it just gets better with every new version.
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Recently Posted
107.1 hrs
Posted: October 25
Best game in existence! Love this game, I stimulates everything about space travel. And if you want more, just download a couple mods, it is the perfect sim.
Helpful? Yes No Funny
4.3 hrs
Posted: October 25
I knew a guy who pirated this, and then he bought it cause he was like, yeah these guys deserved the money. This is a good game, if you can stomach rewatching tutorials a thousand time over about apedospis and trajectories, spins, plots and other ♥♥♥♥ i cant really understand you can goto the moon and beyond with ragtag teams of loveable idiots. Honestly I never knew i needed that in my life but i did. Felt like I was in control of a ♥♥♥♥♥♥♥♥ version of Bruce Willis and Ben Afflick as I took to the skys, and proceeded to accidently leave ben on the moon.

I couldve been your hero baby...
Helpful? Yes No Funny
138.3 hrs
Posted: October 25
love it
Helpful? Yes No Funny
308.9 hrs
Posted: October 24
Helpful? Yes No Funny
Hugh Mungus
2,326.2 hrs
Posted: October 24
I still don't know how to do half the stuff in this game.
Helpful? Yes No Funny
5.8 hrs
Posted: October 24
I built a giant rocket and sent lots of people to space, rocket was to heavy so had to dump some people outta there, they died. Unfortunately. Then we came on mars and i dropped the last people out of my rocket, I went back home and left all of the people there, I think they died.

When I was home i started playing Kerbal Space Program.

10/10 would ♥♥♥♥ kerbins again
Helpful? Yes No Funny
6.1 hrs
Posted: October 24
I left Jebodiah in space, I#m a terrible person...


Would leave him there again.
Helpful? Yes No Funny
170.7 hrs
Pre-Release Review
Posted: October 24
KSP one of my long time loves, how I love thee.
Play this game, you will thank me, unless your a scoo, dont be a scoo
Helpful? Yes No Funny
490.8 hrs
Posted: October 23
- Create a hypersonic jet to test some in atmosphere limits
- Crew it with two unlucky ♥♥♥♥♥♥♥s
- Mach 4.5
- 5 km altitude
- pull up sharply
- Wings break off
- Jet goes into a flat spin
- Spinning so fast it's slowing its fall to <20 m/s
- Splashes down
- Both Kerbals survive
- Promptly send them out on another suicide mission

10/10 would kill Kerbals for "science" again
Helpful? Yes No Funny
Jack McNuggets
0.6 hrs
Posted: October 23
it smells like meat
Helpful? Yes No Funny