"Xenonaut"-achievement not unlocking

[Koivulainen]

"Xenonaut"-achievement not unlocking

I've unlocked all the other achievements for the original game except for the story-based "Xenonaut", this sucks big time because it is the only thing stopping me from getting 100% completion.

Anyone else having the same issue? Or perhaps even a solution? I have no save game to go back to, I've also unlocked story-based achievements noth before and after this one.

 

[Sunsibar]

You can always try clearing your cache. Maybe that helps, if returning back to old saves is not possible.