How many people are playing Kerbal Space Program right now?

2,768 people are playing Kerbal Space Program on Steam right now, making it the 319th most played game on Steam. In the last 24 hours it peaked at 3,193 players. The number updates every few minutes.

What is Kerbal Space Program's all-time peak player count?

Kerbal Space Program's highest concurrent player count on Steam is 23,459, reached in April 2026.

Is Kerbal Space Program good? What do Steam reviews say?

95% of 121,862 Steam user reviews are positive (Overwhelmingly Positive).

How much does Kerbal Space Program cost on Steam?

Kerbal Space Program costs $39.99 on Steam (US).

Does Kerbal Space Program work on Steam Deck?

Kerbal Space Program is Playable on Steam Deck (with small issues), according to Valve's Steam Deck compatibility check.

Kerbal Space Program

by Squad · published by Private Division · Released Apr 27, 2015

Steam Deck PlayableLinux & Deck: Platinum

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Players now

#319

2,768

▼ 0.6%vs 24h ago · updates every minute

Review score

95% positive

Overwhelmingly Positive121,862 reviews

Owners (est.)2M–5M

24h peak

3,193

Highest seen23,459

Apr 20267 months ago

Price on Steam

$39.99

Lowest ever $39.99 Oct 2026

RisingSteadyFalling

Players -0.6% in the last 24 hoursUpdated 16:29 UTC · tracking since 2013-03-01

Concurrent players

Last 7 days

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Players onlineSteam sale started

Media & details

Screenshots, achievements, specs and price history from Steam.

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Where to buy

Steam prices for United States (change the country in the top bar), and Steam keys from authorized stores.

Steam Official

Prices update every 6 hours

$39.99

Buy

Other authorized stores

FanaticalSteam key
−72% $39.99 $11.19
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GameBilletSteam key
−13% $39.99 $34.79
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GamesplanetSteam key
−10% $39.99 $35.99
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GreenManGamingSteam key
$39.99
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IndieGalaSteam key
$39.99
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WinGameStoreSteam key
$39.99
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GamersGateSteam key
$39.99
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Every key here activates in your Steam library. US prices, updated every few hours.

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Editions and bundles on Steam

Kerbal Space ProgramEdition
$39.99
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Bundles with this game (1), biggest discount first

Kerbal Space Program: Complete EditionBundle
$62.97
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Reviews

95% positive of 121,862 · Overwhelmingly Positive · Live from Steam

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Steam Deck

Works, but may need extra effort. Results from Valve's own testing.

Steam Deck Playable

!Controller glyphs do not match deck device
!Text input does not automatically invokes keyboard
✓Default controller config fully functional
✓Interface text is legible
✓Default configuration is performant

Steam Deck

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Patches & builds

Every build released on Steam for this game since we started tracking it, with the developer's patch notes. Updated within minutes of each new build.

Jan 11, 2023, 2:05 PM UTC
Build 10132464the current build when we started tracking6.5 GB on Windows

Patch notes

Jan 25, 2023
PatchSmall Patch
Hello Kerbonauts! We are pushing an update to the launcher today. Most notably, the launcher will no longer remain open or run in the background after you launch Kerbal Space Program. We are also adding an optional PD Account login flow. This is in preparation…
Jan 11, 2023
PatchKerbal Space Program 1.12.5 is live...
ChangeLog: =================================== v1.12.5 ============================================================ +++ Improvements * Added something...on Mun.
Nov 2, 2022
PatchKerbal Space Program 1.12.4 is live
Hello Kerbonauts! We here at mission control are happy to launch patch 1.12.4 on Wednesday November 2nd, 2022 which addresses the long awaited tutorial bug fixes! We have also squashed an Alarm Clock bug that ignored custom day/year lengths. As we are dedicati…
Dec 13, 2021
PatchKerbal Space Program 1.12.3 is live!
Hello Kerbonauts! Kerbal Space Program 1.12.3 is live! This small patch addressed drifting issues with robotic parts and rotating docking ports. Check out this patch's Changelog for further details: ==================== v1.12.3 ==================== +++ Bugfixe…

Other news (16)

Apr 7, 2026
Kerbal Space Program rockets to its highest concurrent player count on Steam in more than 10 years
Maybe it's a coincidence and maybe it's not, but as the Artemis 2 spacecraft comes rolling around the moon like Jimmy Kirk and co. heading off to save the whales, the aging reach-for-the-stars simulator Kerbal Space Program is seeing a major uptick in players …
Aug 15, 2025
KSP x Youtooz plushies now available!
Official KSP plushies are now available to pre-order for the next 4 weeks only: https://youtooz.com/collections/kerbal-space-program. Get them before they are gone forever!
Jul 3, 2023
I love this proposed Kerbal Space Program Lego set very much
Kerbal Space Program is a game where you assemble cool things out of neat parts and then eventually break them on accident. The Lego hobby is about literally the same thing. Understandably, there's more than a bit of crossover... Read more.
Jun 22, 2023
Blast into Summer with Kerbal Space Program 2
Happy Summer, Kerbonauts! 🔆 Kerbal Space Program 2 is at a discounted price of 20% off until July 13th at 1PM ET. Join us in the Early Access journey into the stars and experience exciting new features as they first-hand as they come online. We also just rele…
Feb 24, 2023
Kerbal Space Program 2 Early Access is Out Now!
Kerbonauts, it’s finally time! Kerbal Space Program 2 blasts off into Early Access today! Pioneer the game with us as we enter the deep space journey of Early Access. Your feedback and suggestions can help shape the future of the game. Make sure to join the Di…
Jan 17, 2023
Intercept Games Discord Now Live!
Hey Kerbonauts, our Official Discord is now live! Join today and get ready for the launch of KSP2! Join here: Intercept Games Discord
Jan 5, 2023
Shadow Tactics: Aiko's Choice and Kerbal Space Program are free from Epic
Shadow Tactics is such a good real-time tactics stealth strategy game that it rejuvenated the genre. There's a chance you already own the sneaky samurai sim, however, and much less of a chance that you own its standalone expansion, Aiko's Choice . It's the lat…
Oct 21, 2022
Kerbal Space Program 2 rockets into early access in February
Space flight simulation sequel Kerbal Space Program 2 will finally get to take off in early access on PC on February 24th, 2023, devs Intercept Games have announced. The early access version of the game will allow you to fully travel around the Kerbolar system…
May 24, 2022
They flew a freaking Kerbal to the International Space Station
Kerbal Space Program is a simulation game, released on Steam early access in 2013, where players take charge of an embryonic space program crewed by Kerbals. These little green humanoid-y things are pretty charming, and one of the game's joys is watching …
Apr 4, 2022
Recreating gravity in games is harder than you'd think
Gravity is one of the simplest and most complicated things in existence. It's both as straightforward as jumping, and a source of cosmic machinations and monsters that defy the imagination. The entity holding you to the ground right now is the same princi…
Mar 17, 2022
Fly me to the Mun with these adorable Kerbal Space Program artisan keycaps
If you truly want to display your passion for getting all of Kerbalkind travelling through the cosmos, then the new Kerbal Space Program artisan keycaps are truly the best way. Well, the best way to show it off to anyone looking at your keyboard, I guess... Re…
Jan 4, 2022
Mortal Kombat 11, Final Fantasy 12 added to PlayStation Now for January
Sony announced that January will see six new games added to the streaming gaming service PlayStation Now , mixing big budget and indie releases that add up to a quality month overall. The games are Final Fantasy 12: The Zodiac Age, Mortal Kombat 11, Super Time…
Oct 8, 2021
NASA to relive most Kerbal Mun landings by throwing spaceship at rock
NASA has a plan to stop potentially dangerous asteroids headed towards Earth, and it involves throwing spacecraft at them until they go away... Read more.
Aug 7, 2021
After a decade, Kerbal Space Program development is over
fter 10 years in active development, Kerbal Space Program has finally released its last big patch. Kerbal Space Program 1.12.2 went live this week as the last major patch in the sustained development of Kerbal Space Program. This follows the release of the hug…
Aug 7, 2021
Kerbal Space Program development has ended after ten years
Kerbal Space Program update 1.12.2 is live. It's a relatively minor set of fixes, but it marks the completion of the 1.12 update - and, in turn, the end of "sustained development" of KSP. It's been a fun ten years, but its development team are now turning thei…
Aug 6, 2021
After more than a decade, development of Kerbal Space Program has come to an end
Kerbal Space Program studio Squad has finally brought development of its acclaimed space flight sim to a close, over a decade after the game's first public release. Kerbal Space Program - which initially launched into early access via Squad's website in 2011 -…

Patches & builds

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History

What changed on Steam for this game since we started following it: prices and sales, builds, name, release date and review score.

Review score: 95% on 2026-11-01 → 95% today (121,862 reviews)

Oct 31, 2026Price$39.99

History

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DLC

2 items on Steam, newest first.

Kerbal Space Program: Breaking Ground Expansion
$14.9977% positive
Kerbal Space Program: Making History Expansion
$14.9968% positive

DLC

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Trading cards

8 cards. Buying one of each costs $0.50, which crafts this game's badge; the foil set costs $9.20.

Wernher von Kerman$0.06

Foil cards (8)

Wernher von Kerman$0.37

Prices checked 2026-11-01, lowest Steam Community Market listing in US dollars.

Trading cards

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