I've nearly unlocked all the science tech tree. How does the game change after that?

Specifically, is there any reason for more science when I've unlocked everything?

I've unlocked pretty much everything within Kerbin's SOI, is there any reason for conducting interplanetary science? Surely, I could fill out the entire tech tree with just 1 more planet. Why, then, would I do science all the way out to Eeloo if I've filled the tech tree? Is there an achievement, more parts, upgraded parts, anything?

  • Grab a mod like the interstellar mod(not actually about interstellar travel) which adds a whole lot more to the tech tree.
    – user58680
    Nov 1, 2013 at 1:51

3 Answers 3


Currently (0.23), there is few practical difference between sandbox and career mode after you unlocked the whole tech tree. You have all parts available and are free to use them to do whatever you like.

The only difference is that you can still use experiments in career mode, while in sandbox mode all experiments are disabled. This doesn't give you any gameplay benefit, but it gives you the opportunity to read the flavor texts of the experiments performed on outer planets and moons. Some of them are quite interesting and/or entertaining. One EVA report on Eeloo is really cute, by the way.

Currently there is a lot more science to farm in the KSP solar system than you need to unlock the whole tech tree. And considering that it is planned that more planets than just Kerbin, Mun and Minmus will gain different biomes, the science output will just increase. If and how the developers will balance this in future updates (more tech tiers? Make later tiers more expensive? Scale down scientific values? New uses for science points?) is currently just guessing.

  • Not only that, but they've said that they made the research tree easily moddable, so mods can throw their parts somewhere in the tree, making it (theoretically) infinitely expandable.
    – Frank
    Oct 21, 2013 at 15:31
  • That last line isn't needed; once the game gets updated, ideally the answer should get updated to keep up with it.
    – Frank
    Oct 21, 2013 at 15:40

If you are using mods, like KSP Interstellar, playing career over sandbox has one advantage: there are more things you can spend Science points on, not only unlocking tech tree. You can upgrade your parts with it, too. Being able to collect them with core Kerbal experiments, not only with Science Lab is a huge advantage - for example, on Kerbin orbit lab produces only 0.017 science per day - you can harvest way more just by observing goo pretty much anywhere.

  • That was exactly the answer I was looking for. What to do next? I've stumbled upon KSP Interstellar and I'm amazed by the Alcubierre Drive. So you confirm that this mod really works and adds many interesting things to do after the tech tree is complete! Thank you very much!
    – Avio
    Feb 8, 2014 at 20:25

I haven't played 0.22 yet, but from what I've gathered from Scott Manley's video of 0.22 and interview with one of the devs, the tech tree is the only thing. There are no achievements or anything like that at this point.

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