(SPOILERS: Race for the end; final resource unclear...?)

[Green Theem]

This game is phenominal! It took me a whole week to finally unlock the computer, and then the rest of the achievements flew in...except for the fact that I still can't figure out how to get guns in one game sitting.
Also, I finally can't figure out how to get plutonium. The compendium says "a rare resource" right now, but I don't know anything else. Is it just a random super low spawn from a mineral card? Is it from the Aliens? I noticed that the Aliens are in the compendium's Objects list, and I know I saw the UFOs, so do they land? If so, How do I get them to meet my derpy little people?

[Mopster]

It has to do with the UFO, but you also need a certain amount of IQ to inspect

Hit the UFO by lightning, aim below the craft so it the lightning goes through the UFO to the ground

[shoobers]

Originally posted by Mopster:

It has to do with the UFO, but you also need a certain amount of IQ to inspect

Hit the UFO by lightning, aim below the craft so it the lightning goes through the UFO to the ground

I found you also need to be Peaceful and not mixed.

[Green Theem]

Thanks! When I reached the final part of the story, my game soft-locked, and I had to close it, but the achievement still unlocked thankfully.
Now I’m gonna try and replicate it during a “100%” run through: I.e. get everything unlocked in one session!

[Lamaman]

Be careful not to hit the UFO close to your "base" of flammables (crops, trees etc.). The crash functions like a lightning producing fire.