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