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