Here is the full list of all 90 Aground achievements.
The base game contains 86 achievements, and there is 1 DLC pack containing 4 achievements.
Defeat a Diode Wolf.
Build the Elevator.
Solve the Bandit problem.
Build the Factory.
Upgrade your character with 500 or more Skill Points.
Build the Power Plant.
Build the Wyrm Pen.
Now what do I do with it?
Build a Boat.
Cook a Pizza.
Build the Dock.
Build a structure with a Blueprint.
Add a Pen to the Farm.
Mine a Diamond.
Defeat a Golem.
Get the Backpack.
Build the Market.
Build the Laboratory.
Defeat a Wyrm.
Build the Workshop.
Add an Orchard to the Farm.
Build the Kitchen.
Build the Farm.
Build the Smelter.
Defeat a Boar.
Build the Storehouse.
Build the Hut.
Buy a Super Pack.
Hatch a Dragon from a Cocoon.
Successfully Confront the Mirrows.
Read all the Logs.
Catch an Electric Eel.
Obtain Full Cyborg Gear.
Complete the Minotaur Maze.
Fly on a Dragon.
Defeat the Wyrm Queen.
Activate the Synthesizer.
Activate the Forge.
Enchant a Chainsaw.
Capture a spirit of every element.
Chop down a Purple Tree.
Obtain a full set of dragon equipment.
Activate the Time Manipulator.
Defeat the Old One.
Defeat the Golemech.
Build a Submarine.
Build a Jeep.
Build a Jet.
Build the Com Station.
Repair the Fighter Escort ship.
Defeat the Kraken.
Upgrade your Hut.
Discover a Life Pod.
Collect a Pearl.
Defeat the Pirates.
Build any type of Worker Bot.
Activate the Vine Copse.
Craft your first Spellbook.
Forge an Evolution Gem.
Defeat the Hail Storm.
Evolve a Dragon Ship.
Obtain a full set of witch equipment.
Build your first Space Station.
Research the Alien Locator.
Defeat a Dragomech.
Install a full set of upgraded Cyborg gear.
Defeat an Enemy Cruiser.
Complete the Museum.
Craft every Spellbook in game.
Evolve a Mecha Dragon.