Here is the full list of all 12 Sky Nations achievements.
Trade with Merchant Cat for over 100000 coins. Where do his funds even come from?
Fall to your death in the clouds. They look like they're made out of candy floss. They're not and now you know that.
You've killed 1000 players. You can't even remember their faces any more. Killing is all you know now.
Look up information in the in-game Knowledge Base.
We'd give you a gold watch, well actually we wouldn't. So here's an achievement. Spent 100+ hours playing Sky Nations.
"Accidentally" killed 10 friendlies.
Craft your first item.
Perform over 1000 system jumps in your travels.
Pilot a ship with more than 5000 mass.
You have a special set of skills. Unfortunately, it's dying a lot. I hope you're proud.
Create or join a Nation. The empire begins here!
Kill another player while having only 10HP or less left.