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Kerbal Space Program

Kerbal Space Program isn’t just a fantastic space game. It’s one of those games that makes you glad you play on PC, because it could only come to exist on PC.
Kerbal Space Program Game Cover
86%Game Brain Score
Most mentioned positive aspects:gameplay, story
Most mentioned negative aspects:stability, grinding
96% User Score Based on 100,614 reviews
Critic Score 77%Based on 22 reviews

Platforms

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Kerbal Space Program Game Cover

About Kerbal Space Program

Kerbal Space Program is a single player open world simulation game with comedy and science fiction themes. It was developed by Squad and was released on April 27, 2015. It received mostly positive reviews from critics and overwhelmingly positive reviews from players.

The Kerbal Space Program Enhanced Edition Complete bundle includes the heavily-awarded and ever evolving space simulation game Kerbal Space Program as well as the History and Parts Pack & Breaking Ground expansion for a bundled discount.

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Games Like Kerbal Space Program

Looking for games like Kerbal Space Program? Here are top open world simulation recommendations with a comedy and science fiction focus, selected from player-similarity data — start with Spaceflight Simulator, Space Engineers or Scrap Mechanic.

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Reviews

96%Audience ScoreBased on 100,614 reviews
gameplay1.3k positive mentions
stability607 negative mentions

  • Kerbal Space Program offers deeply rewarding and educational gameplay based on realistic simplified orbital mechanics, allowing players to creatively design spacecraft and understand aerospace concepts through trial and error.
  • The humor and charming character design of the kerbals, combined with engaging physics and slapstick comedy, make the gameplay accessible, entertaining, and emotionally impactful.
  • The game boasts wide mod support and an active community that greatly enhances graphics, optimization, replayability, and customization, extending the longevity and depth of the experience.
  • The base graphics are dated and low-quality, often requiring multiple mods to achieve appealing visuals, and the game can suffer from graphical and stability issues including crashes and driver problems.
  • Kerbal Space Program has a steep learning curve and a grindy, repetitive career mode with limited mission variety, which can be tedious and frustrating for some players.
  • The game is prone to bugs, glitches, and occasional save file corruption, which can negatively impact gameplay and frustrate players, especially when combined with stability issues from mods or complex vessels.
  • gameplay

    5,402 mentions Positive Neutral Negative
    25% positive mentions, 74% neutral mentions, 1% negative mentions

    Kerbal Space Program offers deeply rewarding gameplay centered on realistic, simplified orbital mechanics that educate players on spaceflight, rocket design, and physics through trial and error. While it has a steep learning curve and can be initially complex, mastering its mechanics provides a satisfying and intuitive understanding of aerospace concepts. Extensive mod support further enriches gameplay, extending replayability and customization, making it a standout simulation that balances scientific accuracy with engaging, creative sandbox fun.

    • “Kerbal Space Program is an incredible game that offers endless hours of fun and educational gameplay, teaching you orbital mechanics in a fun and accessible way without needing prior knowledge.”
    • “This game masterfully combines realistic physics with accessible gameplay, allowing players to design, build, and launch their own spacecraft while exploring the intricacies of orbital mechanics, providing an engaging and rewarding experience.”
    • “By providing a tool to visualize complex topics like orbital mechanics, this game helps players learn the basics of space travel intuitively, making orbital mechanics not only understandable but enjoyable through hands-on experimentation and trial-and-error gameplay.”
    • “The game isn't the best beginner friendly but if you learn the simple mechanics the game would get extremely easy.”
    • “Though the mechanics are simplified KSP will give you a practical level of understanding of orbital mechanics and space exploration that no uni course or degree ever could.”
    • “There is a very hard learning curve for this game; it takes time to learn all of the mechanics.”
  • story

    4,668 mentions Positive Neutral Negative
    11% positive mentions, 85% neutral mentions, 4% negative mentions

    Kerbal Space Program features no traditional story or narrative; instead, it offers a sandbox experience where players create their own missions and stories through space exploration challenges. The career mode provides mission objectives and progression through completing contracts, research, and upgrades, but missions can feel repetitive and sometimes lack clear guidance. Success is deeply rewarding after trial-and-error and rescue missions, fostering a strong sense of accomplishment and engagement despite a steep learning curve and occasional bugs.

    • “I'm not even overstating right now, one of if not the best game I've played ever, a kind of game that will make you sit for 2 hours and after successfully completing a mission lean against your chair with your hands wrapped around your head with the kind of feeling you get after watching a 2 hours film with an insane ending. If you love orbital mechanics, spaceships, satellites, and space in general, this game is entirely made for you, especially if you're studying or working in a field related to space.”
    • “After 1 month of playing and 300 hours of playtime, 1 kerbal killed (it was Jeb RIP), many rockets, missions, stations, and satellites that failed... I finally landed on the Mun with Carlie and Bill and they safely returned, finally...”
    • “Every success feels earned, and every catastrophic failure somehow becomes a memorable story.”
    • “The career mode is quite well made, starting with small rockets to play with and basically only the kerbin orbit as possible missions from the game. Eventually you venture out into the solar system and send out probes to other planets, after that you can finally send out manned missions to other planets and try to land on them. This is all a pretty reasonable mission profile in my opinion.”
    • “This is a good game but gets boring really fast. There's no life anywhere you can explore all of Kerbin which is literally where the Kerbals live and there's no Kerbals or cities in sight. Even at the KSC there's no life; it almost looks abandoned. There's no Kerbals even at their space center and even on the other planets there's nothing, maybe a couple monoliths and a sstv pyramid on Duna but those are just remnants of a cut storyline. This game is 30% rocket science and 70% missed opportunities.”
    • “The missions are sometimes game-generated, such as 'save Bobkin Kerman from low Kerbin orbit,' or personal challenges, like building a massive reusable interplanetary craft and sending it on a mission to every moon around Jool. The campaign missions could be more varied and I would like the ability to create my own agenda (instead of pulling from a pool of mission options) because sometimes to make the really extreme happen, you have to jump back to sandbox mode or risk forfeiting all of your money or reputation just to build something in space that would be too unrealistic to do on the planet.”
  • humor

    1,888 mentions Positive Neutral Negative
    100% positive mentions, 0% neutral mentions, 0% negative mentions

    The humor in Kerbal Space Program is widely praised for its perfect blend of educational content, realistic physics, and slapstick comedy, especially through the antics and reactions of the endearing green kerbals. Players enjoy the hilarious failures, such as rockets exploding and kerbals facing comical deaths, which lighten the otherwise complex and challenging space simulation. This quirky, lighthearted tone combined with witty in-game commentary and character animations keeps the gameplay entertaining and accessible, making even setbacks fun and rewarding.

    • “Kerbal Space Program isn't just a game about rockets and space — it’s about taking on the vastness of the cosmos with creativity, persistence, and, above all, a sense of humor.”
    • “Failure is often times hilarious, like whenever I accidentally ran a rocket into the moon at mach-jesus, unless you've been trying to do something forever and it just won't work.”
    • “The kerbals are funny little characters and the updates this game has received since I bought it is insane.”
    • “The animations I did see were mostly tiny and not funny.”
    • “I have put so many hours into this game, it's not funny.”
    • “You may eliminate everything that makes this mode not funny at all, and still not have an ability to load your saves.”
  • graphics

    1,828 mentions Positive Neutral Negative
    34% positive mentions, 58% neutral mentions, 8% negative mentions

    The graphics of Kerbal Space Program are generally considered dated and basic, reflecting its 2011 release, but the game's charming, cartoony art style complements its complex physics and gameplay. While the base visuals may appear unimpressive or low-resolution by modern standards, a vast and active modding community offers numerous graphical enhancement mods that can transform the game’s appearance to near-modern levels. Overall, although not a graphical showcase, the game balances visual simplicity with engaging content and is playable even on low-end PCs, with mods strongly recommended for improved aesthetics.

    • “With the right mods added, this game shines graphically.”
    • “The great thing about the mods in terms of graphics is that if you have an old potato laptop you can still run the game and have a blast, but if you have a fancy modern PC you can install mods like Deferred and EVE that literally make the graphics for this look like a 2022 AAA game instead of a 2015 indie game, and the difference there is huge.”
    • “The graphics can be absolutely immaculate if you download like 8 mods, I'm talking accurate atmospheric scattering and beautiful ocean shaders, custom skyboxes that make it look like you are in a nebula, terrain shaders and ground scatter that make the planets in this game look better than some movies, a completely new and amazing lighting system, and so much more.”
    • “The graphics are terrible and most of the time, the graphics driver crashes or nearly crashes.”
    • “The graphical fidelity is laughable, it runs simulation on just 1 core making fps terrible with everything large enough to be interesting, and it's not that stable, and that's without you even think about adding in mods.”
    • “The graphics sometimes look like they came straight out of a PlayStation 1.”
  • atmosphere

    1,058 mentions Positive Neutral Negative
    23% positive mentions, 74% neutral mentions, 3% negative mentions

    The atmosphere aspect in the game is highly praised for its realistic and challenging simulation of aerodynamic drag, heat, and reentry physics, which creates a tense yet rewarding experience as players try to break through it and return safely. Many players find learning to navigate the atmosphere difficult but satisfying, with thrilling moments of success and frequent entertaining failures involving rockets exploding or burning up. The game's detailed physics and atmospheric effects, enhanced further by mods, greatly contribute to an immersive space exploration atmosphere that balances education, humor, and challenge.

    • “The feeling when you recover from it by setting a parameter on a hunk of metal plummeting through the atmosphere and heating up when you've got seconds to get it right - and it works, and the crew not only survives but comes in for a nice, soft landing...”
    • “The gratification of building a ship that finds its way through the atmosphere into the great abyss of space is quite a reward.”
    • “Watching your kerbonauts' grinning faces as they rip through the upper atmosphere in a blaze of debris and fire is enough to bring a childlike smile to any of the worst curmudgeons' faces.”
    • “You start off with basic parts that only let you go as high as the upper atmosphere, and it is rather fitting then to have the player take charge of these kerbals as well as taking control of them during the many trips that they will make from kerbin and outwards, seeing as just trying to successfully make it out of the atmosphere of the starting planet is a challenge in its own right as the difficulty will vary greatly depending on which of the three game modes you play here.”
    • “The game is hard to learn, the learning curve is steep because although the build system is seemingly simple and the planets are small enough to be friendly (smaller atmospheres, slower orbital speeds), the aerodynamic model is incredibly intricate and the physics engine scarcely pulls its punches.”
    • “It's been almost 20 hours and I barely make it out of the atmosphere every time I make a rocket.”
  • stability

    648 mentions Positive Neutral Negative
    6% positive mentions, 0% neutral mentions, 94% negative mentions

    Kerbal Space Program is a highly enjoyable and addicting space simulation game praised for its realistic physics, but it remains buggy and prone to glitches that can sometimes frustrate players. While many find the bugs part of its charm, issues like crashes, physics glitches, and occasionally unstable save files are common, especially with mods or complex crafts. Despite its age and quirks, it runs well on modest hardware, has an active modding community that improves stability, and is generally considered more stable and feature-rich than its buggy sequel, KSP2.

    • “There were performance issues in early access but the devs switched the game to run on a new version of Unity with x64 support for release and the game runs great now.”
    • “I play the game in Linux (Ubuntu 14.04 LTS 64bit), and the game runs great there overall. There are some minor bugs in the demo, which is based on an older version of the game; when you buy the full version it's slightly more advanced, and I have not experienced any of the bugs apparent in the demo. Thumbs up.”
    • “Game completed, runs great on 64-bit version; now mods aren't an issue and you can load it up until the cows come home.”
    • “It is super buggy and stuff and it may just randomly stop working for a month and then come back for no reason.”
    • “Basically I had been working on this ship for 3 sessions over the course of three days, and today I load the saved ship as always in order to add a probe and complete the staging (I had basically already completed the rocket, and in half an hour of work I'd be able to launch), but when I load, all parts on my entire ship have been detached from each other, which means that if I were to launch, the ship would fall apart. There's no actual way to fix this, except for rebuilding the entire rocket I had spent about 7-8 hours on.”
    • “The game is full of bugs and annoying glitches; it gets really frustrating when you spend hours playing with your spaceship or aircraft only to be bogged down by the bugs in the game.”
  • replayability

    459 mentions Positive Neutral Negative
    51% positive mentions, 48% neutral mentions, 1% negative mentions

    Kerbal Space Program boasts extremely high replayability, driven by its deep, engaging gameplay and extensive modding community that offers practically infinite content and customization. Players consistently highlight the game's educational value, creative freedom, and longevity across multiple modes, with mods further enhancing and extending its near-limitless replay value. Even after years, the game remains fresh and addictive, offering hundreds to thousands of hours of enjoyable and varied experiences.

    • “With near-endless replayability, constant updates, and beautiful mod support, KSP is the game that keeps on giving.”
    • “Kerbal Space Program is infinitely replayable, never really gets old, and has enough mods and external developer content to keep you interested for hundreds of hours.”
    • “The modding scene really brings it up to being replayable forever (practically).”
    • “No replayability on base but with mods it's much better especially with the multiplayer mod.”
    • “As for replay value, I’m not sure how replayable it is.”
    • “Replay value on career mode is a bit short, and leaves you wanting more. This game has great mods for it currently that stay up to date with the game patches so far.”
  • optimization

    410 mentions Positive Neutral Negative
    23% positive mentions, 63% neutral mentions, 14% negative mentions

    Kerbal Space Program offers generally good optimization, running smoothly on a wide range of hardware including low-end laptops, especially without heavy mod use. Performance can degrade significantly with large, complex vessels or extensive modding due to CPU and memory limitations, with occasional stuttering and bugs impacting stability. While ongoing updates and community mods have improved optimization, some users still experience frame drops and loading delays, making the game less optimal on older or less powerful systems.

    • “It's more optimized than ever and with mods like Kortex and KSP Community Fixes, even extremely heavy mods are playable with their incredible optimization.”
    • “Plus, it's well optimized such that I can play anywhere I'd like on my laptop too, so your simple gaming rig can probably do the same!”
    • “Performance-wise, KSP runs surprisingly well even with complex vessels and a heavily modded install.”
    • “Things like solar panels not working for whatever reason, stuttering, memory bloating, parts simply not working... pick your issue.”
    • “Part of the game design is iteration of rocket designs to achieve your desired goals. In the early game, load times and recovery are quick, but in mid to late game, launching larger, complex multi-stage systems results in long load times and slideshow-level performance.”
    • “The performance is atrocious; add any graphical mods and you'll need a powerful PC just to keep frame rates above 80 on the lowest 5%.”
  • grinding

    370 mentions Positive Neutral Negative
    1% positive mentions, 36% neutral mentions, 63% negative mentions

    Grinding in Kerbal Space Program, especially in career and science modes, is frequently described as tedious, repetitive, and time-consuming, involving numerous trial-and-error attempts, managing contracts, and gathering science points. While this grind can be frustrating for newcomers or those seeking quicker progression, many players find it ultimately rewarding, educational, and integral to the sense of accomplishment the game offers. Sandbox mode avoids much of this grind, allowing more creative freedom without the resource-management tedium.

    • “You'll need a second life for grinding (if you want to get all achievements).”
    • “Not the grindy crafting thing so popular in other games recently.”
    • “It's not tedious though, it's actually fun.”
    • “Career mode is boringly grindy at the start if you don't know all the tricks by heart.”
    • “Repetitive tasks: grinding resources and completing contracts can feel monotonous after a while.”
    • “The career mode is very demanding and not very innovative; contracts mostly make you do the same missions repeatedly, which becomes tedious and frustrating.”
  • music

    294 mentions Positive Neutral Negative
    33% positive mentions, 63% neutral mentions, 4% negative mentions

    The music in the game is widely praised for its calming, inspiring, and atmospheric qualities, often enhancing the sense of awe and accomplishment during space exploration. While many appreciate the royalty-free soundtrack's jazzy and space-themed vibe, some find it repetitive over long play sessions and suggest additional variety or the option to use custom music. Overall, the soundtrack significantly contributes to the game's immersive and emotional experience.

    • “The unresolved bugs in this game take it from being a spectacular time sink where you can get lost for dozens of hours at a time in a gentle pit of musical building... to a pit of frustration so heinous that you will, on multiple occasions, force close it just to be done with that music!”
    • “And then there’s the music — that iconic, hopeful soundtrack that captures the feeling of discovery perfectly.”
    • “The soundtrack has a good selection and puts me in the mood when looking back at the home planet I left knowing that I am on my way to another world.”
    • “The unresolved bugs in this game take it from being a spectacular time sink where you can get lost for dozens of hours at a time in a gentle pit of musical building... to a pit of frustration so heinous that you will, on multiple occasions, force close it just to be done with that music... that f***ing music!!!!”
    • “They never bothered to secure an actual soundtrack, so the whole game sounds like an online psychology class module (lots of free and free-sounding music), easily fixed by mods of course but still annoying.”
    • “The music is calming, but it, too, will start to grate on you as you hear the same song yet again.”
  • emotional

    166 mentions Positive Neutral Negative
    100% positive mentions, 0% neutral mentions, 0% negative mentions

    Kerbal Space Program delivers a profound emotional experience, combining moments of exhilarating triumph and heartbreaking failure that evoke joy, frustration, pride, and deep attachment to the charming kerbals. Its challenging learning curve, immersive physics, and heartfelt humor create a unique rollercoaster of feelings—from feeling like a brilliant rocket scientist to the crushing pain of mission loss, making it unlike any other game. Players often describe it as touching, wholesome, and emotionally transformative, with achievements like reaching orbit or landing on the Mun being genuinely moving and unforgettable.

    • “It lived up to every single bit of its potential, there was nothing like the feeling of watching your space station's solar panels extend for the first time in orbit, or the feeling of touching down and walking around on the Mun, and again when you safely landed back on Earth. I would recommend this to anybody who spent their childhood gazing in awe at the sky, watching space documentaries, reading books on space. This game is one of a kind, and when the second one comes out, I'm going to do it all over again.”
    • “The developers made Kerbals the cutest, most hilarious characters; the whole game is wholesome and well developed in a very pleasing way.”
    • “My advice to new players: get CKAN, figure out where your save files live, get some basic mods (KER, Alarm Clock, Precise Maneuver) and prepare yourself for one of the most engaging, tense, frustrating, sleep-depriving, heart-breaking, and gratifying games of this era.”
  • monetization

    132 mentions Positive Neutral Negative
    2% positive mentions, 28% neutral mentions, 70% negative mentions

    The original game is praised for having no microtransactions aside from paid DLC, but recent updates forced a launcher full of ads promoting the cash-grab sequel and DLC, drawing significant community backlash. Concerns include intrusive advertising, data collection termed as spyware, and fear that new ownership by Take-Two Interactive will lead to aggressive monetization strategies like microtransactions and paywalled content, potentially harming the modding community and player experience.

    • “No microtransactions except DLCs.”
    • “A rare great game with no microtransactions.”
    • “This game is in early access admittedly, this may put some of you off, but do not let it be so; this game is as polished and tidy as most AAA releases these days, and there are no microtransactions here—you are buying practically a finished game.”
    • “The game is good, but it's not worth giving your money to the heartless corporate stooges who are trying to sell merch after the full-price, early-access sequel was cancelled and left on the Steam store to rot away in its unfinished state. This whole IP is turned into a cash grab and the original creators probably aren't getting a penny.”
    • “They added a launcher to serve you ads for their new game. Recent update added completely unnecessary bloatware third party launcher that bombards you with ads. Adding a launcher to an 11 year old game just to shove promotions for the sequel in everyone's face without actually paying for advertising.”
    • “I've had this game for years, since version 0.23, and have had a blast with it since, but ever since they came out with the DLCs that you have to pay for that contain cool parts, this means you are locked behind a paywall to use them which, in my opinion, is so stupid and is just a cash grab, when you can have parts with free mods. This is what hurts my experience with the game. Those stupid DLCs should have been free, and every ease of life feature they have added was already around and made by players. I'm sorry but I am not paying for parts I can get for free with mods. Other than that, the game is fantastic and I highly suggest it.”
  • character development

    5 mentions Positive Neutral Negative
    60% positive mentions, 20% neutral mentions, 20% negative mentions

    Character development is largely absent, with minimal story or plot progression, but the game features enjoyable and clever character design and progression elements that enhance the overall experience.

    • “Real physics, great character design, and a clever progression system make this a true game for the ages.”
    • “Funny character design”
    • “Character design is... umm... not important in this genre but yet I can't stop seeing minions :D”
    • “No character development.”
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Play Times

160h Median play time
355h Average play time
113h Main story
602h Completionist
36-550h Spent by most gamers
*Based on 662 analyzed playthroughs
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Frequently Asked Questions

Kerbal Space Program is a open world simulation game with comedy and science fiction themes. Common tags for Kerbal Space Program include indie, trading, educational, exploration, gaming and others.

Kerbal Space Program is available on Nintendo Switch, PlayStation 5, PlayStation 4, Windows and others.

The main story can be completed in around 113 hours, while the entire game is estimated to take about 602 hours to finish. On average players spend around 355 hours playing Kerbal Space Program.

Kerbal Space Program was released on April 27, 2015.

Kerbal Space Program was developed by Squad.

Kerbal Space Program has received mostly positive reviews from players and mostly positive reviews from critics. Most players liked Kerbal Space Program for its gameplay but disliked it for its stability.

Kerbal Space Program is a single player game.

Similar games include Spaceflight Simulator, Space Engineers, Scrap Mechanic, Stormworks: Build and Rescue, Universe Sandbox and others.