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