Kerbal Space Program is a multi-genre game where players create their own space program.
User reviews: Overwhelmingly Positive (17,102 reviews)
Release Date: Mar 20, 2013

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Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if 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 (15)

December 15, 2014

KSP has gone Beta! v0.90.0 is Officially Released!

Hello everyone and welcome to version 0.90.0 of Kerbal Space Program: Beta than ever!



Version 0.90.0 marks the transition from alpha to beta development of the game and will introduce the final major components to career mode. This then is the version that makes the game ‘scope complete’: every major feature that the game was designed to incorporate now exists and from here on, development will shift focus from implementating new systems to improving the existing ones, adding content, polish, balancing and bug fixing.

The update contains many new features and updates to previously existing systems which combined make for quite likely the largest update in the game’s three year history. Here are the highlights:

Upgradable Facilities
In career mode the Kerbal Space Center will advance with your space program. Start out with small buildings and limited functionality and build up your facilities into a state of the art space center with capabilities to launch and manage every mission you’ve ever dreamt of doing. Each building such as the Astronaut Training Complex, Vehicle Assembly Building and Tracking Station can be upgraded separately (and destroyed and repaired too), unlocking new and exciting capabilities and bonuses to your space program. Choose where you spend your money wisely: constructing buildings is most certainly not cheap.

Kerbal Experience and Skills
Your Kerbals now have specific skillsets they will develop as they gain experience: Choosing from your available applicants now mean deciding between pilots, scientists and engineers, each adding abilities specific to their skill, and unlocking further abilities as they earn experience by going on missions in outer space. Pilots are able to take over control of your spacecraft’s orientation to provide stability control during flight; Scientists are better at collecting and analyzing experiment data, so their science skills give bonuses to science collection, data transmission, and lab processing; and an experienced engineer can repair specific parts of your craft which may just save your mission.

Editor Overhaul
Ship Construction has been almost entirely rebuilt from the ground up. The Parts list now allows you tolook up parts not only by function (category), but also by resource, module type, tech level and much more. In case you want to add your own custom categories, that’s possible as well, you can set up lists of your favorite parts and organize your subassemblies into subfolders. As if that wasn’t enough there’s also the option to sort the filtered parts by mass, cost, size and name.

Also new in the Construction Facilites are the Gizmos which will allow you to Offset and Rotate parts, giving you complete control over how they are placed. The functionality to set a new root part for your craft has also been added, so you don’t have to rebuild your entire craft if you decide the root part should be somewhere else.

Other than these, we've also added many other improvements and new features: Symmetry can be toggled between Mirror and Radial modes, in both editors; Crew assignment is now fully persistent as you build; A new Stats toolbar panel lets you see your craft's total mass, part count and size; the list goes on.

Mk3 parts
After the major overhaul on Mk2 spaceplane parts in version 0.25 there is now a lot more to choose from when it comes to the Mk3 spaceplane parts: the old Mk3 parts have given way to a total of 15 all-new parts of unprecedented size, capable of carrying truly enormous payloads. Really. You can fit an orange Jumbo-64 fuel tank inside those cargo bays!

More contracts
Kerbal Space Program version 0.90.0 also brings the Fine Print mod by Arsonide into the game. This addition brings a whole new array of contract types to the table for you to choose from, adding depth and diversity to the contracts system. Survey areas, deploy satellites in precise orbits, capture asteroids, construct orbital space stations and build bases on planets or moons. This isn't a simple mod addition however. Fine Print author Arsonide has worked with us to tweak the mod into the stock game seamlessly. It’s all included and should provide any player with a challenge suited to their skill level and interests.

More biomes
The biomes system has seen a major overhaul for the first beta release of Kerbal Space Program. With help from KSP enthusiast and streamer Tanuki Chau every planet and moon in the game now has new biomes players can go out and explore. From the canyons of Dres to the peaks on Pol, the game now counts over 100 unique biomes. Each of these places represents another location where your Kerbals can gather, analyse, recover and send data from.

These are the major changes for Kerbal Space Program update 0.90. For everything else, check out the complete changelog here:

http://forum.kerbalspaceprogram.com/content/322-KSP-has-gone-Beta%21-v0-90-0-is-Officially-Released%21

As always, the update is now available on the KSPStore and Steam.

We hope you will enjoy Kerbal Space Program: Beta Than Ever as much as we enjoyed making it.

Cheers

210 comments Read more

October 7, 2014

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.

191 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 has different game modes, you can play the Career Mode if you want to expand and manage your own Space Center, taking on missions and researching new technologies. Or you can play Sandbox mode if you're only interested in flying and discovering the Kerbal universe without restrictions. There is even a mid point between these two, Science mode.

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.
  • And a whole lot more!

System Requirements

Windows
Mac OS X
SteamOS + 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
123 of 129 people (95%) found this review helpful
3 people found this review funny
445.9 hrs on record
Posted: December 26, 2014
Early Access Review
Think of Kerbal as a Do-It-Yourself-NASA, albeit less successful because you haven't a clue what you're supposed to be doing. It's all fun though, as you'll learn quite quickly and by the end of the week, along with some Scott Manley Youtube schooling, you'll be on the right track.

You'll probably spend 95% of your time exploding, but that slim 5% that you actually manage to get into orbit, dock two craft together to make a space station, or land on another body (such as the Mun), will become some of the most memorable experiences in your video gaming life.

As close to a solid space simulation as you'll ever get. And extremely mod friendly too!
Was this review helpful? Yes No Funny
112 of 122 people (92%) found this review helpful
33 people found this review funny
239.4 hrs on record
Posted: December 26, 2014
Early Access Review
You think you understand space until you discover that shooting a rocket straight up doesn't lead to orbit, at all.

Buy it.
Was this review helpful? Yes No Funny
87 of 106 people (82%) found this review helpful
53 people found this review funny
42.2 hrs on record
Posted: January 4
Early Access Review
Played this game drunk on new years with 3 friends. This was the crew:

Me: Mission Coordinator/Visionary (Down 4 pints of carling and a litre bottle of cider)
Nathen: Rocket construction man (Not drunk fully, but still had a few)
Andrew: Rocket refiner/Pilot (Down half a litre bottle of cider and a few pints)
Dave: Person who laughs when we exploded (Down quite a few cans of fosters)

Woke up in the morning, one kerbal was stuck in orbit around the sun with no fuel, another was flung into outer space via the mun.

10/10 would pass out while orbiting kerbin again
Was this review helpful? Yes No Funny
50 of 54 people (93%) found this review helpful
18 people found this review funny
158.4 hrs on record
Posted: December 31, 2014
Early Access Review
Kerbal Space Program.

All you have to do is belive. You put in the effort, you succeed. Have faith in your project, and you will emerge victorious.

HAHA. Just kidding. Most of my ships blow up before I even activate the engines.

But really... This game... is the ultiamate sandbox. Anything it can't do, mods will make it do. For example, here is a list of some achievments to acomplish:

*Damage a ship without even taking off
*Blow up a ship while taking off
*Crash into another ship while taking off
*Launch shrapnell into the Kerbal Space Center
*Blow up the Kerbal Space Center
*Blow up nearby rovers
*Accidently launch your take-off rockets upwards like a missile
*Shoot down a satellite with said missile
*Have satellite debris crash into your refueling station
*Have said refueling station and attached ships fall into Kerbin atmosphere
*Have said station and ships burn up in atmosphere and/or impact a solid or liquid surface at over mach two
...and...
*Forget about your Mun lander as it crashes into the surface

That list can be acomplished in once launch.

Now, explain to me why you aren't installing it already?
Was this review helpful? Yes No Funny
99 of 131 people (76%) found this review helpful
79 people found this review funny
1,274.8 hrs on record
Posted: December 27, 2014
Early Access Review
It's okay.
Was this review helpful? Yes No Funny
30 of 33 people (91%) found this review helpful
3 people found this review funny
1,102.9 hrs on record
Posted: December 29, 2014
Early Access Review
Hands down my favorite game. The level of creativity you can achieve assembling discrete parts together into rockets and planes is phenominal.

Plus, one of the best mod communities around; as someone else said, if the game is too hard there's a mod for that, if it's too easy there's a mod for that too. Want better graphics, helicopters, scriptable auto-pilots? Yep, mod, mod, mod. On top of that, installing them is a snap, just drop the mod into the GameData folder and boom, ready to rock!

This latest rendition of 'Beta than Ever' has really added a lot of functionallity and is definitely a fully developed and complete game.

10/10
Was this review helpful? Yes No Funny
47 of 66 people (71%) found this review helpful
10 people found this review funny
1.5 hrs on record
Posted: December 26, 2014
Early Access Review
Wait this game is still in early access?
Was this review helpful? Yes No Funny
19 of 20 people (95%) found this review helpful
2 people found this review funny
16.2 hrs on record
Posted: January 4
Early Access Review
Hilar.. just a lot of fun. Tough, trying... but entertaining.. love the way the Kerbins enjoy or fear the rocket rides..
Lost a guy to an EVA gone wrong.. he laughed all the way to the ground..
Lost a guy to eternal space.. found out how to break the plantet gravity well... to bad I didnt pack enough fuel to come home..
Did achieve a successful orbit. Yay!
One day... the Mun!
Was this review helpful? Yes No Funny
21 of 24 people (88%) found this review helpful
11 people found this review funny
33.7 hrs on record
Posted: December 29, 2014
Early Access Review
Kerbal Death Simulator. 10/10 IGN
Was this review helpful? Yes No Funny
23 of 29 people (79%) found this review helpful
573.0 hrs on record
Posted: December 27, 2014
Early Access Review
Play this game until you love it.
Was this review helpful? Yes No Funny
16 of 20 people (80%) found this review helpful
6 people found this review funny
17.8 hrs on record
Posted: January 2
Early Access Review
This game thought me more about science better than school did.
9/10
Was this review helpful? Yes No Funny
13 of 16 people (81%) found this review helpful
10 people found this review funny
36.9 hrs on record
Posted: January 1
Early Access Review
Houston, we have a problem...
Was this review helpful? Yes No Funny
9 of 9 people (100%) found this review helpful
1 person found this review funny
977.8 hrs on record
Posted: January 10
Early Access Review
Oh boy, this game is definitely worth your money. My Kerbal Space Program story originated over 2 years ago when a friend suggested it and I quickly shrugged it off. I started watching videos, downloaded the demo, got hooked and here I am with over 960 hours and still going in this game. I never run out of things to do. Yes there is a huge learning curve but it is totally worth it. Even with the amount of time I have dedicated to this game I still cannot perfectly perform maneuvers, but what would be the fun in that? The modding community is great, as is the community in general. I have never seen a community so dedicated to ehlping others as the Kerbal community is. Now that the game is in beta I feel like we are a step closer to the final product and i would completely recommend buying this game before it's price continues to increase.
Was this review helpful? Yes No Funny
11 of 15 people (73%) found this review helpful
241.0 hrs on record
Posted: January 1
Early Access Review
This game = Good
Was this review helpful? Yes No Funny
6 of 6 people (100%) found this review helpful
5 people found this review funny
608.0 hrs on record
Posted: December 26, 2014
Early Access Review
It's like being addicted to bashing your face into a brick wall, and then saying this wall needs spikes!
Was this review helpful? Yes No Funny
16 of 25 people (64%) found this review helpful
10 people found this review funny
25.9 hrs on record
Posted: January 15
Early Access Review
a perfect jihad simulator worthy of the caliphate
Was this review helpful? Yes No Funny
7 of 8 people (88%) found this review helpful
1 person found this review funny
15.5 hrs on record
Posted: December 31, 2014
Early Access Review
I dont normally review Early Access games, so I won't review this one. But I'm so excited for this game. If THIS is only Early Access, I can't wait to see the full release. There's more content in Beta right now than most fully developed AAA games.
Was this review helpful? Yes No Funny
5 of 5 people (100%) found this review helpful
47.2 hrs on record
Posted: December 29, 2014
Early Access Review
This game is not for the people looking to shoot lazers at each other. It is, however, extremely addictive and tons of fun. It can be as serious or silly as you'd like it to be. Craft a ship that's balanced and functional that keeps in line with thrust to weight ratios, or over-power a tiny satellite and send it into the sun or out of the entire solar system! Loads of fun and endless replayability. BETA is an awesome development and I can't wait for the final release. 10/10
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4 of 4 people (100%) found this review helpful
1 person found this review funny
122.7 hrs on record
Posted: January 11
Early Access Review
Kerbal Space Program is an excellent game if you like anything to do to aeronautics and space. You start off with limited parts but as you progress and do missions and launches you get gradually better and reach out further and further into the cosmos!

The more you play the more possibilities are opened out to you and since I love doin sciency ♥♥♥♥ this game is just great for me! And I recommend it completely!
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4 of 4 people (100%) found this review helpful
8 people found this review funny
29.8 hrs on record
Posted: January 17
Early Access Review
I found this game very offensive. The little alien creatures, "Kerbals," are continuosly put in harms way within this game and explode many times. This filth is promoting genocide of an entire planet's inhabitants. Horrible 9/10.
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