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