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.
Build the Smelter.
Defeat a Boar.
Build the Storehouse.
Build the Hut.
Build the Farm.
Add an Orchard to the Farm.
Build the Kitchen.
Get the Backpack.
Build the Workshop.
Defeat a Wyrm.
Defeat a Golem.
Mine a Diamond.
Build the Market.
Buy a Super Pack.
Now what do I do with it?
Add a Pen to the Farm.
Cook a Pizza.
Build the Dock.
Build a Boat.
Build the Laboratory.
Build the Wyrm Pen.
Hatch a Dragon from a Cocoon.
Build the Power Plant.
Build the Factory.
Build the Elevator.
Solve the Bandit problem.
Defeat a Diode Wolf.
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.
Build a structure with a Blueprint.
Upgrade your character with 500 or more Skill Points.
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.