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