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 Com Station.
Read all the Logs.
Activate the Vine Copse.
Defeat the Old One.
Activate the Time Manipulator.
Activate the Forge.
Complete the Minotaur Maze.
Activate the Synthesizer.
Obtain Full Cyborg Gear.
Cook a Pizza.
Upgrade your Hut.
Build a Jet.
Defeat the Pirates.
Repair the Fighter Escort ship.
Build the Elevator.
Build a Submarine.
Discover a Life Pod.
Defeat the Wyrm Queen.
Chop down a Purple Tree.
Fly on a Dragon.
Hatch a Dragon from a Cocoon.
Successfully Confront the Mirrows.
Defeat a Diode Wolf.
Upgrade your character with 500 or more Skill Points.
Build the Factory.
Solve the Bandit problem.
Build the Power Plant.
Build a Boat.
Mine a Diamond.
Build a structure with a Blueprint.
Build the Dock.
Add a Pen to the Farm.
Build the Wyrm Pen.
Now what do I do with it?
Buy a Super Pack.
Build the Market.
Defeat a Golem.
Get the Backpack.
Build the Workshop.
Build the Laboratory.
Defeat a Wyrm.
Add an Orchard to the Farm.
Build the Kitchen.
Build the Farm.
Build the Smelter.
Defeat a Boar.
Build the Storehouse.
Build the Hut.
Catch an Electric Eel.
Enchant a Chainsaw.
Capture a spirit of every element.
Obtain a full set of dragon equipment.
Defeat the Golemech.
Build a Jeep.
Defeat the Kraken.
Collect a Pearl.
Build any type of Worker Bot.
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.