Full list of all 27 Terra Nil achievements. It takes around 20-25 hours to unlock all of the achievements in the base game on Windows.
The base game contains 17 achievements, and there is 1 DLC pack containing 10 achievements.
Restore the River Valley
Fully restore all animal species, biomes and climate conditions in the tropical region
Fully restore all animal species, biomes and climate conditions in the polar region
Fully restore all animal species, biomes and climate conditions in the continental region
Restore the Abandoned Quarry
Restore the Archipelago
Restore the Polluted Fjord
Restore the Irradiated Sprawl
Completely restore the planet
Use screenshot mode to take a full map screenshot
Appreciate the beauty of nature for at least 60 seconds
Burn down 25 buildings with a single fire
Create rock by causing lava and river to meet
Restore the tropical region with at least 40% of the map being underwater
Restore the Volcanic Glacier while still having at least 15 lava tiles
Have 3 different groups of bears that are fully satisfied in the River Valley
Engineer a single location with 6 overlapping animal groups that are fully satisfied
Restore the Polluted Bay
Restore the Hill and Dale
Restore the Desolate Island
Restore the Scorched Caldera
Restore the Volcanic Glacier
Restore the Subpolar River
Restore the Flooded City
Restore the Continental Outskirts
Fully restore all animal species, biomes and climate conditions in the temperate region
Complete a mission with at least 20 fully satisfied animal groups