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