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