

I’m sure it’s more complex than I’m making it out to be, but each gas in the air has its own freezing/melting boiling/condensation/sublimation points, so I’d imagine you could just kind of take advantage of that
Basically just cool it down to x temperature at y pressure, and all of the carbon dioxide should be solid, the oxygen a liquid and the nitrogen still a gas, and they’ve all sort of separated themselves out. Fish out the dry ice, siphon off the oxygen, and you’re left with nitrogen.
Might need to do a couple more rounds of that on each of those to account for other gases in the mix depending on how pure you need it to be, but in theory I imagine it could be that simple (again in practice I’m sure there’s probably a lot of details I’m missing)



I just recently started it for the first time.
If you’re into this sort of game, it’s really good. I haven’t exactly played a ton of similar games to compare it to, but it’s pretty hard for me to imagine a game that would do what it does better. I think if it had launched in the state it’s currently in it would have absolutely blown peoples minds when it launched a decade ago.
Also since it is, at its core, a decade old game, it runs really well on my computer which is mostly made up of 10+ year old components (and on linux! I did have a little audio stuttering issue that was fixed by just adding a launch option in steam, pretty sure that was just a quirk of my particular hardware)
The story is a little weird, not bad, just maybe not what I would have chosen if I was the writer, and the story is secondary to the building and exploration in this kind of game anyway.
I could nitpick some things about the UI if I really wanted to, and the usual issues with procedurally generated content where you have a big universe to explore but it feels kind of empty (which is also kind of the point) and some of the planets start feeling kind of the same after a while.