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