It mostly works in the version KSP 1.9 (correctly displays: HUD1, HUD2, Orbital, Surface, Vessel, Rendezvous, Thermal, Body) but maneuver, landing does not work at all, even while editing these bookmarks including custom bookmarks (eg. Post-burn data). The most popular versions of this tool are 5.2, 4.6 and 4.2. The most widespread installation file names of this program are ckan.exe, Kerbal Space Program V1.00 Trainer +3 MrAntiFun.EXE, KSP.exe, KSPStart.exe and KSPx64.exe etc.

Contact Us

KSP Support

KSP Info

For general contact and information about the game.

KSP Press

For all media, press and business development contact.

FAQs

This Kerbal Space Program knowledge base contains the most common problems and questions users have. Please check here before contacting support, because we may already have an answer to your question.

Account Issues

I purchased without making an account and I can’t login to KSP Store.
After you checkout from KSP Store, the system will automatically create a KSP Store Account with the email address and password you type in the Checkout Form. You should be able to log in using those details and the instructions here. If you do not receive a confirmation email, due to your email provider blocking it, don’t worry, you can still log in and download the game.
When I try to login, it says “There is no account associated with this e-mail address”.
It's possible that you mistyped your email address when you created your account or filled out the Checkout Form of KSP Store. Send an email to KSP Support explaining your problem, your KSP Store Account email address and your Invoice ID. Note that the Invoice ID is NOT the Transaction ID and NOT the Receipt ID.
I’ve used the password recovery feature to reset my password, but I didn’t get any recovery email.
Please be sure to check your spam folder. We also have realized that some email providers (Verizon, Sbcglobal.net, Freenet.de, Comcast, etc.) have blocked our domain (kerbalspaceprogram.com) and IP Address due to their strict incoming email rules. They added us to their spam lists, so you won’t receive any email from us. Send an email to KSP Support explaining your problem. They will manually reset your password and ask you to change your KSP Store Account email address. If you are using an account from Gmail, Hotmail, Yahoo, or something similar, you might want to check your spam folder before asking for help, password-recovery emails usually end up in the spam folder.
I currently have a weird auto-generated password. How do I change it?
Log in with your current password and click the My Account button, go to the bottom of your profile and click the Edit Profile button. There you can edit most of your account information, including the password.
I used the password reset, but the password you sent me doesn’t work. What’s the problem?
When this happens, it is possible when you copy-and-pasted the password from the email message you received, you may have copied the blank spaces too. Please double check this and make sure that the necessary characters are copied.
I bought the game on the KSP Store, but I want it on Steam. Will you give me a Steam Key?
The option to transfer KSP Store licenses to Steam is only available for those who bought KSP before it originally came out on Steam, March 20, 2013. Note that if you do qualify for a transfer and choose to do it, the process is OPTIONAL and IRREVERSIBLE. If you transfer your purchase to Steam, you will no longer be able to download or update the game from the KSP Store. To move to Steam, log in to your KSP Store profile and you will find the button to start the process next to your download link. If you can’t see the button in your profile it means you purchased the game after it was on Steam and you are not eligible, no exceptions, please don’t insist.
I bought the game on Steam, but I want it on the KSP Store/GOG as well. Would you activate my account for download?
No, sorry, the migration will not work that way. If you bought the game on Steam, you will only have it on Steam. To get it in the KSP Store too, you will have to purchase it here. Do keep in mind that the Steam version is DRM free, so it can be played offline as well, so you’re really not missing out on anything with the Steam version instead of the KSP Store one.
How can I receive support in a language different to English?
You can write an email to [email protected] in the language that you feel most comfortable. This does not guarantee that you will receive an answer by a native speaker of said language. This FAQ is also translated to Spanish, Russian, Chinese and Japanese.

Purchase Issues

You can purchase Kerbal Space Program directly from the website by clicking here.
I never received the confirmation email after I purchased the game.
This is due to some email providers blocking our automated email server. It doesn’t really matter, all the email tells you is that everything was successful and that you can download the game by following these instructions. You can still download the game even if you didn’t receive this email.
We are unable to refund purchases. For 3rd party sites (Steam, GOG, etc.) the refund policy for the given site applies.
I bought a Gift Code and I gave it to a friend. How do we redeem it?
Please contact our support team directly at [email protected].
I paid for a Gift Code, but never received it. What do I do?
First of all, make absolutely sure it is not in your spam folder. Send an email to KSP Support, tell them what happened and be sure to attach your receipt.
If I buy the game now, will I have to buy it again for the next update?
No, if you buy the game now you won’t have to pay for further free updates. Be sure to check this information too. Expansion packs such as Making History Expansion will need to be purchased.
I saw the post stating that players who purchased the game before May 2013 will get expansions for Free. Does this apply to Steam purchases as well?
Yes, any purchase made before May 1, 2013 counts, regardless of the payment or distribution method.

Download and Installation Issues

How do I get the game if I’ve already purchased it?
Login to KSP Store. You will find the download link in your My account Page or in the Product Detail page. Here are more in-depth instructions.
How do I update the game to the most recent version?
You can download the updater file from your account page as well. See the previous question for in-depth instructions.
The download link is not shown in my Products Purchased list and I’ve already completed the transaction.
Do note that it may take a few minutes for the link to show up. If the link has not appeared after one hour since your purchase, send your Paypal Receipt to KSP Support with a brief explanation. This will prove you bought the game and it will be easier to solve the problem.
When I try to download, I get a “Server Migration” error.
Please, be sure to not refresh or add any URL directly on your browser. Sometimes you can experience a disconnection from your internet and that cuts the download process. Go back to your KSP Account page and click the download button to start the process again. Also, try downloading the game from a different web browser.
I try to open the game on Mac and the following message comes up: “KSP can’t be opened because it is from an unidentified developer”

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You have to change your Gatekeeper settings please look here to see how you do that.
My game crashed, what do I do so it won’t crash anymore?
For starters, please check the Self Help for Crashes article, if your issue is not covered send your crash dumps to KSP Support so they can figure out what this is about. Do notice that we will only be able to provide support if you are not using mods.
We have the last version from each development cycle since 1.0 available for download. On the KSP Store they are on the Downloads section of your profile. On Steam and GOG, you have to download them as Betas, in the respective tab of the desktop application.It’s not possible to officially download versions prior to 1.0.
The game for Windows doesn’t run. It says “There should be a KSP_Data folder next to the executable”. What do I do?
This most likely due to you having moved the KSP executable, (KSP.exe). You are not supposed to move anything out of the KSP root folder KSP_win). If you did move it, please try putting it back, then everything should work. Another cause may be you trying to run the exe file directly inside the zip file, you have to extract all the contents first. We recommend you use the installer rather than the zip file for an easier experience.
The game for Mac just bounces on the dock, but never actually opens. What now?
Follow these instructions:Right click (ctrl+click or whatever) the KSP.app file and select the ‘Show package contents’ optionNavigate to the Contents->MacOS folder, inside it you should find a Kerbal Space Program exec fileOpen the Terminal and type ‘sudo chmod +x’ (without the quotes, note the blank space at the end) and drag and drop the exec file from the previous point from the Finder to the Terminal, hit enterThe Terminal will ask for your password, the mac password, not the KSP one. It will seem as though you were not typing, but you are. Hit enter after you finish typing.If the Terminal doesn’t give an error message, you should be able to just double click KSP.app from the Finder to start the game.
I try to open the game on macOS and I either get a black screen or a lot of stuttering. How can I play KSP on macOS?
This is due to low-level changes introduced by Apple in the latest version of macOS, 10.13 High Sierra. See the announcement on our support forum for more information and workarounds.

Gameplay Issues

The game gets to a screen with a slideshow, a loading bar and some clever game tips, but it’s stuck there, the loading bar doesn’t move. What can I do?
This most likely due to you having moved the KSP executable, (KSP.app for mac or KSP.exe for windows). You are not supposed to move anything out of the KSP root folder (KSP_win or KSP_osx folder). If you did move it, please try putting it back, then everything should work. Also, keep in mind that sometimes mods break the game causing it to fail to load. If this started happening after you installed mods to your game you may want to remove them. If none of the above is the problem contact us to get another solution.
I installed mods on a previous version and since the game updated, it's now acting weird or flat out crashing. Why is this?
Mods are very likely to break from one update to another, we suggest you delete your mods and wait for the mod maker to officially state that they work with the newer version before downloading and installing them again. Or roll-back the update to the previous version where you know mods work fine. Instructions to do that on Steam can be found here. For the KSP Store, since updating is on-demand, if using mods it’s recommended to hold from updating to a new major version until you know all the mods have been updated. If you already updated and want to roll back, downloading the previous version installer and using it over the same folder should do the trick.
When I start the game, I get a strange error that says “GetThreadContext Failed” and the game crashes.
This is most likely about a background program interfering with the execution, the prime suspect is an Antivirus, but it may be something else. Try turning the Antivirus off and see if the game starts okay. It should also help to update your graphics drivers and/or Video BIOS.
Will Kerbal Space Program be released in other languages?
Yes! On PC, KSP is already available on Spanish, Russian, Simplified Chinese, Japanese, German, French, Portuguese and Italian.On consoles, we’re continually exploring the possibility of further language updates to Kerbal Space Program Enhanced Edition, and will update the community with any news.

Console Issues

Is KSP going to be released in major game consoles?
Yes, Kerbal Space Program Enhanced Edition is now available on both Xbox One and PlayStation 4.
If I purchased the PC version of KSP can I get any of the console versions for free?
No, sorry, the console ports are separate products and must be purchased separately.
If I buy the PS4/Xbox One version of KSP will I also get the PC version?
No, sorry, each console version and the PC version have to be purchased separately.
How do I purchase and download a console port of KSP?

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In order to purchase the KSP on PS4 and/or Xbox One you have to go into the Xbox One or the PlayStation Store and search for Kerbal Space Program Enhanced Edition. Once there, select the game and follow the instructions to complete your purchase. The game will be added to your downloads. Once the download and installation are completed, you can start launching your Kerbals into orbit.
How do I redeem the Kerbal Space Program Enhanced Edition for free if I own the previous version.
Follow the instructions outlined in the announcement in our official forum. Do notice that this will only work if you didn’t ask a refund for the previous version at any point.

Miscellaneous

I want to use KSP for a school, museum or another educational related project. May I?
Yes, Kerbal Space Program encourages ‘Space Education’. We partnered with TeacherGaming and created ‘KerbaEdu’ for schools, so you can visit their website to contact them and know more about this.
I cannot access the Forums/Spaceport or the KSP website. What should I do?
Send an email to KSP Support explaining the situation and don’t forget to tell them your IP address, if you don’t know it you can get it from here.
Short answer: When it’s ready.Long answer: It is very hard to estimate a release date for any software product because unexpected things happen all the time, that’s why we don’t give release dates, not even estimates. We used to do it before but we could hardly ever release on the promised date, which caused people to get upset, and since we don’t want to disappoint you, but above all we don’t want to rush a release of a potentially buggy and untested product, we’ll keep the timeline to ourselves and release the game updates when we feel they are presentable to public.Follow us on our social media for any other updates.
1.9
Official release
Released 2/12/2020
SteamSteam Community
← 1.8.11.9.1 →
⇐ 1.81.10 ⇒
Version 1.9, named There's No Place Like Home, is a major update that released on February 12, 2020.[1] An update for the Making History and Breaking Ground expansions were released alongside this major release.
  • 1Changes

Changes

Improvements

  • Added Camera mode (unlocked camera movement controls) when game is paused in flight and you hide the UI.
  • Adjust Kerbal ladder navigation to remove sliding and provide better automatic transition between ladders.
  • Part Mass and Cost now clamp their value to avoid negative numbers results from Mass/Cost Modifiers - configured per part via minimumMass and minimumCost in each parts cfg.
  • Revamped Kerbin scaled space planet.
  • Implement single camera system when running in DX11 for improved performance.
  • Add new part - FTE-1 Drain Valve to drain resources from attached parts.
  • Add new Cheat option in the Debug Menu - Set Position to teleport a vessel to a position relative to the surface of a celestial body.
  • Added medium and high Quality shader for Moho.
  • Adjust Wheel brake setting and auto-friction to take into account Gee. Helps with rovers flipping over.
  • Each KAL Window now persists its screen position with the KAL.
  • KSPedia slides and assets now load on demand and are released when the KSPedia window is closed.
  • Add handling for Ships folder in GameData/SquadExpansion where stock craft including DLC parts can be stored.
  • Added Ultra Quality shader for Kerbin.
  • Implement new Max Time Warp logic to allow faster warp rates when on rails. This is managed by gamesettings (ORBIT_WARP_MAXRATE_MODE = PeAltitude).
  • Implement Limit modifier for altitude based Max Time Warp logic so players can tune when the mode is set to (ORBIT_WARP_MAXRATE_MODE = VesselAltitude).
  • Change Default VesselSwitching Keys ( [ or ] ) to bypass debris and spaceobjects.
  • Add Mod + VesselSwitching Keys ( [ or ] ) to include debris and spaceobjects.
  • Add search box to career tech tree.
  • Added High Quality shader for Kerbin.
  • Created new textures with higher detail for Kerbin's low quality terrain shader.

Localization

  • Fix variant name in selector being cropped in some languages like Japanese
  • Fix missing font character affecting some KSPedia slides in Russian.
  • Fix missing font character affecting Orbit Info UI in Chinese.

Parts

  • Revamped Skipper engine.
  • Revamped Mainsail engine with silver variant.
  • BACC 'Thumper' Solid Fuel Booster revamp.
  • RE-M3 Mainsail (New 'Full', 'Mid' and 'Bare' variants).
  • RE-I5 Skipper (New 'Shroud', 'Truss Mount' and 'Bare' variants).
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Bugfixes

  • Fix tab key switching for columns in the settings screen, it will focus the first available item.
  • Fix part filter showing no parts after switching between subassemblies, variants and simple mode.
  • Fix renamed asteroids needing a scene change to update screen and kb info.
  • Fix NREs where Breaking Ground Science VesselType should not be available without the DLC.
  • Fix surface attach node handling on Part Variants.
  • Fix action sets input losing focus when renaming and moving the mouse away from the input field.
  • Fix errors EVAing in timewarp via crew hatch dialog.
  • Fix additional launchsite CommNet stations being active even when those launchsites are not active in the currently loaded save.
  • Fix shadows on KSC filler tiles when lights are shone on them.
  • Fix NREs and oxygen timeliness checks resulting in kerbals dying when they shouldn't when no helmet on.
  • Fix NRE pressing Ctrl-Z (undo) many times with symmetry part selected.
  • Fix audio FX fade when objects move away from player's camera.
  • Fix dV calcs for boosters with fuel flow priorities changed (specific use cases).
  • Fix Discontinuity in texture mapping on the Mun with high quality shader.
  • Fix Walkway textures around level 3 RnD building.
  • Fix issue where symmetry could break when restoring a held part on a vessel and immediately placing the held part again.
  • Fix Inputlock manager issue with MenuNavigation breaking single mouse clicks.
  • Fix SAS target mode misalignment when control point is not the vessel root
  • Fix NRE when deploying science experiments attached to debris when on EVA.
  • Fix reentry FX.
  • Fix target marker disappearing in the Ascent Tutorial.
  • Fix Terrain shader causing crashes on AMD GPUs.
  • Fix underwater fog.
  • Fix log spam when player attempts to drag maneuver nodes backwards through patched conics crossing SOIs.
  • Fix dV calcs on stages that have different tank priorities in the same stage.
  • Fix manipulating maneuver nodes unhiding the Navball throughout gameplay.
  • Fix NRE being generated when staging a service module inside of a fairing in liftoff during flight.
  • Fix Kerbodyne S3-14400, Kerbodyne S3-7200 and Kerbodyne S3-3600 colliders being visible during Place Mode.
  • Fix Rockomax Brand Adapter 02 being off-center.
  • Fix Mastodon and Skiff bottom attach nodes being backwards.
  • Fix issue with quicksaves loading active vessel about to crash causing the vessel to pass through the terrain. Quicksaves can no longer be made when the active vessel is about to crash into the ground (including EVA kerbals).
  • Fix contract generation issues in Editor when reputation changes by allowing contract generation in Editor scene.
  • Fix parachutes deploying on quicksave load or staging when set to only stage when safe and conditions are not safe.
  • Fixed texturing being broken on corner of Bop.
  • Fix part highlight remaining on parts when removed from action groups in the editor.
  • Fix error when manipulating servos that are part of an action group
  • Fix terrain texturing jitter on celestial body low quality shader when landing from Orbit.
  • Fix mirror attach on bicouplers.
  • Fix KSPedia Aircraft/Basics/Balancing act page slide missing in Chinese
  • Fix opening the In-Flight Action Sets Editor unlocking vessel functions without a Command Module present in flight during gameplay.
  • Fix the KAL-1000 curve starting below minValue for some parts.
  • Fix Flight UI mode being locked during Time Warp.
  • Kerbal Body collider adjusted to reduce collisions while on a ladder.

Mods

  • Add Per Kerbal PhysicMaterial Accessors for Modders so you can adjust each kerbals bounciness - SetPhysicMaterial, ResetPhysicMaterial.
  • Fix Issue for mods when copying parts that had modified resource lists.
  • Fix potential NRE in music player for mods.
  • Set the KSP Assembly version correctly on game start so KSPAssemblyDependency will work for KSP versions.
  • Added events for Action Groups in flight visibility changes so mods can handle any UI changes they need to in each mode
  • Added Pause/UnPause events when the action groups show/hide in flight.
  • Fix PQS.radiusmax not including some noise PQSMods in the calcs PQSMod_VertexHeightNoise and PQSMod_VertexPlanet. Should mean that radisumax is no longer below any vertex in most cases
  1. ↑https://steamcommunity.com/games/220200/announcements/detail/1718623319872133657
Official release
Beta
Alpha
Demo
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