Here is the full list of all 19 Trove achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Using the gem forge, upgrade all of the stats on nine Stellar Gems to max
Achieve Geode Mastery 100
Water 1,000 plants.
Harvest from 50 plants.
Fully upgrade your GAS Module
Compost 10,000 items at the Compost Bin.
Using the gem forge, upgrade all of the stats on a Stellar Gem to max
Achieve Geode Mastery 20
Throw 5000 bombs in Bomber Royale
Win your first Bomber Royale match
Get your first GAS module upgrade
Using the gem forge, upgrade a Stellar Gem stat to max
Enter the Shadow Tower and defeat the Darknik Dreadnought on Normal Difficulty
Enter the Shadow Tower and defeat the Shadow Hydrakken on Normal Difficulty
Enter the Shadow Tower and defeat the Shadow Hydrakken on Hard Difficulty
Select a Subclass
Enter the Shadow Tower and defeat the Darknik Dreadnought on Ultra Difficulty
Enter the Shadow Tower and defeat the Darknik Dreadnought on Hard Difficulty
Enter the Shadow Tower and defeat the Shadow Hydrakken on Ultra Difficulty