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