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: Overwhelmingly Positive (25,492 reviews) - 97% of the 25,492 user reviews for this game are positive.
Release Date: Apr 27, 2015

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Recommended By Curators

"A perfect blend of science and slapstick, and a robust and compelling sandbox of possibility. Simply outstanding."
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Recent updates View all (28)

November 11

SteamController Support for KSP!

Hi again,

We're happy to announce that we've just released a small update which enables support for the Steam Controller in KSP.

This isn't a new version of KSP. It's a steam-only plugin (like a mod) that is included with the Steam version of the game. It interfaces with the Steamworks API and talks to the Steam Controller to make it context-aware in KSP.

That means KSP now supports five control modes for Steam Controller bindings: Menu, Flight, Docking, Editor and Map controls. Those modes will change automatically as you play. (Look for an on-screen message on the lower-right to see when modes are changing)

Each mode is set up to make the most of the controller in each area of the game. For instance, in flight, the triggers control throttle (incrementally on a soft pull, max throttle/cutoff on a full pull). In other modes, they are used to select things.

All modes share a common set of bindings, which means you shouldn't have to learn 5 completely different control sets. On all modes, the right pad controls the mouse (and camera), and the left pad is a scrollwheel.

The pads also have extra functions on them that change depending on context. In flight, docking and map modes, LeftGrip (which is always bound as a shifter key in all modes) enables Touch Menus on each pad, exposing controls for action groups, quicksaving/loading, as well as changing between Docking and Flight controls in the flight UI.

In the Editors, you'll find other actions 'behind' the trackpads too. Here, you just need to click them to get to buttons to change editor tools (Place, Offset, Rotate and Root in the left pad) and tweak other advanced editor settings as well (Symmetry Mode and Reference Frame on the right pad)

In all modes (except menu ofc) you can double tap the right pad to lock the camera into mouselook mode (a feature just added in 1.0.5). This will lock the mouse to move the camera instead of the cursor, just as was possible before in internal view. To leave mouselook mode, just tap the right pad again, or double-tap the left or middle mouse buttons, or Esc if you want to be extra dramatic.

There are a lot more little features to find in the new official KSP Controller Bindings, and I invite you to dive in and explore the many options and sub-options there.

We've been testing this profile extensively, and so far, I haven't come across any situation in the game that wasn't doable through the controller. In fact, this is quickly growing into my favorite method of playing KSP. Honestly.

Lastly, if you ever forget which mode you are in, you can simply Pause and unpause the game. The current mode will pop up on screen.

That's all there is to it for now. Have fun playing KSP with your new Steam Controller!


64 comments Read more

November 9

KSP 1.0.5 is Live

Greetings, Kerbonauts!

It has been a while, longer than we anticipated in any case, but we're now here with a new update for Kerbal Space Program: version 1.0.5!

This update features content, bugfixes and rebalances that were part of the upcoming monster update 1.1, which will feature such things as multithreaded physics calculations and 64 bit support for Windows and OSX. That update is taking longer than anticipated, and we came to a point where a lot of content was ready to go through testing and be released on its own merits. With these parts ready we wanted to get them to you as fast as possible, and I think we have succeeded in a speedy delivery of this patch.

Here are some of the highlights in this patch:

  • Contextual Contracts & Contract Changes
    The contracts system has had a major overhaul with the goal of providing you with more varied and relevant contracts. In short, we’ve added contextual contracts and passive milestone rewards. Contextual contracts monitor your progress in the game and hook into existing existing spacecraft, whereas passive milestone rewards will reward more adventurous players for setting a world first without accepting the corresponding contracts. A new strategy in the Administration Building will boost these rewards.

  • Thermodynamic improvements
    Update 1.0.5 features many improvements to the thermodynamic systems. The thermodynamics system has been reworked to correct the various issues encountered in 1.0.4, and supports differential skin-internal temperatures and non-instant changes. We've also corrected some issues with the atmospheres of other celestial bodies, and better tuned re-entry and aerobraking across the board. Core heat was introduced, which allows for simulating things such as warm-up time & overheating without it being directly coupled to the part temperature.

  • New buoyancy model
    The water buoyancy has been completely reworked. Water is now less soupy and it's very possible to build seaplanes. The density of oceans differs across celestials bodies, invoking new gameplay challenges. The impact tolerances take into account just the speed of the craft, but also the angle at which it hits the water.

  • New rocket and spaceplane parts
    A wide selection of new parts is made available in this patch: from high-vectoring space shuttle main engines and a reskinned toroidal aerospike all the way to tiny and humongous jet engines and a cargo ramp for Mk.3 planes. We’ve also added new stock vehicles to the game to go with these new parts.

  • Bugfixes & Tweaks
    KSP 1.0.5 has many bugfixes: over 100 issues were fixed, including launch clamps following you to orbit, . And good news for anyone with a fine eye for detail: the black stripes on the NASA tanks now line up perfectly! There were of course plenty more bugs on the 'fixed list', but we refer you to our forums or the readme file for the complete list.

Click here for the official release announcement. The update is now available on Steam.

126 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:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:1 GB HD space
    • OS:Windows 8 or 10 64 bit
    • Processor:Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space
    • OS:Snow Leopard (10.6)
    • Processor:Intel
    • Memory:3 GB RAM
    • Graphics:SM3 512MB VRAM
    • Hard Drive:1 GB HD space
    • OS:Yosemite (10.10)
    • Processor:Intel Core i5
    • 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
    • OS:Ubuntu 14.04
    • Processor:Core i5
    • Memory:4 GB RAM
    • Graphics:SM4 1GB VRAM
    • Hard Drive:2 GB HD space
Helpful customer reviews
1,284 of 1,310 people (98%) found this review helpful
248 people found this review funny
1,308.3 hrs on record
Posted: June 11
Words alone cannot express how amazing KSP is.

To be honest, this is not a game for everyone. If you are in the market for some fast-paced "space combat sim" with all kinds of weapons and big explosions, then this isn't what you are looking for. (Except for the big explosions... KSP has you covered there).

However, if you ever dreamed of actually being an astronaut, this is definitely for you. If you sometimes forget to breath when watching recordings of the Apollo moon landings, this is definitely for you. If precise, measured flying; careful planning; and delta-v budgeting are what drives you, this is definitely for you. If you want to learn about Orbital Mechanics and are dying to know what the Oberth Effect or a Hofman Transfer Orbit are, this is definitely for you. If you like Physics, this is definitely for you.

Optionally, if you just like building rediculously large rockets and watching them explode with glorious comedy when they fail catastrophically because you forgot ONE PART... then this is also definitely for you.

Kerbal Space Program is challenging, fun, frustrating, mind boggling, huge, hilarious, complicated, deep, and just plain awesome.
Was this review helpful? Yes No Funny
520 of 571 people (91%) found this review helpful
505 people found this review funny
566.1 hrs on record
Posted: June 24
Played the game for 400 hours on minimum graphics, discovered I could run the game at max settings just fine.

Was this review helpful? Yes No Funny
354 of 379 people (93%) found this review helpful
442 people found this review funny
99.3 hrs on record
Posted: July 10
Sent a mission to the Mun
Got science
Started taking off
Looked at fuel
Got my kerbal out of the ship
Forced him to throw himself at the ship repeatedly
Made it back home

11/10 Would Throw Kerbals at Ship to deorbit again
Was this review helpful? Yes No Funny
133 of 137 people (97%) found this review helpful
39 people found this review funny
135.4 hrs on record
Posted: June 20
When you play Kerbal Space Program, you find yourself becoming one of two types of individuals. Either you throw everything together and make things up as you go, or you spend equally as much time planning for a mission as actually flying it. Either way, mission success (whatever you define that to be) is always either painstakingly earned or astronomically lucky (pun intended). It's very hard to compare to the feeling of seeing a safe splashdown after one of your Kerbals (the characters that man spacecraft) has walked on the surface of another celestial body. It's also hard to compare to the humbling feeling you get when you've made it halfway across the Kerbol system after significant planning and execution time only to realize that you left your landing legs at home.

This game will frustrate and exhilarate you. Well worth the purchase.
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241 of 283 people (85%) found this review helpful
276 people found this review funny
156.0 hrs on record
Posted: June 20
Spent 150 hours sending a kerban into the sun.

10/10 would do again
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