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