Here is the full list of all 20 Eufloria HD achievements.
Complete the main game.
Record all of the Ancient Artifacts.
Complete "200" without any of your own trees being destroyed.
Terraform an asteroid to maximum resources.
Gather ten flowers on an asteroid.
Complete "Protection" without destroying anyone else's trees.
Find over 700 of the lost seedlings in the game.
Gather five mines on an asteroid.
A pitched battle that lasts over 15 minutes and incurs 500 losses between all sides.
Battle for an enemy asteroid for ten minutes.
Attack an enemy asteroid and destroy 200 seedlings in the process.
Defend one of your own asteroids continuously for five minutes.
Destroy ten enemy seedlings using a mine explosion.
Discover an asteroid using a flower or a mine.
Attack an enemy asteroid and lose 300 seedlings in the process.
Land a beacon seed on an enemy asteroid.
Complete Dark Matter Mode.
Complete "The Centre Cannot Hold" within 60 minutes.
Complete Story Mode in under ten hours.
Send a flower or a mine over 50000 arbitrary distance units.