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.
Fight 12 battles.
Find 60 lost crates and barrels.
Find 300 mushrooms.
Own 5,000 gold coins.
Have 350 fame.
Catch 160 fish.
Find 12 pearls.
Find 140 eggs.
Find 12 treasures.
Make 25 sun solutions.
Hunt down 65 wild animals.
Help two ghosts.
Heal five people.
Find 30 lost crates and barrels.
Rest 50 times in a camp.
Pick 45 herbs.
Gather 40 sacks of night flowers.
Learn an expert skill.
Build or repair 10 structures.
Find 25 crayfish.
Gather 15 barrels of algae.
Find father.
Catch 80 fish.
Find 150 mushrooms.
Get a boat.
Own 500 gold coins.
Hunt down 25 wild animals.
Become a soldier.
Have 100 fame.
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.