Here is the full list of all 38 Hero of the Kingdom achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Destroy the Dark Lord.
Find 60 lost crates and barrels.
Find 140 eggs.
Find 300 mushrooms.
Rest 50 times in a camp.
Make 25 sun solutions.
Gather 40 sacks of night flowers.
Hunt down 65 wild animals.
Catch 160 fish.
Gather 15 barrels of algae.
Own 5,000 gold coins.
Pick 45 herbs.
Fight 12 battles.
Catch 80 fish.
Find 12 treasures.
Hunt down 25 wild animals.
Have 350 fame.
Heal five people.
Help two ghosts.
Build or repair 10 structures.
Find 12 pearls.
Learn an expert skill.
Find father.
Own 500 gold coins.
Find 30 lost crates and barrels.
Find 25 crayfish.
Become a soldier.
Find 150 mushrooms.
Have 100 fame.
Get a boat.
Learn an advanced skill.
Finish the water mill.
Learn three skills.
Get a weapon.
Make a barter.
Leave the home farm.
Saw 10 pieces of wood.
Get working tools.