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 60 lost crates and barrels.
Find 300 mushrooms.
Find 12 treasures.
Find 140 eggs.
Own 5,000 gold coins.
Catch 160 fish.
Have 350 fame.
Help two ghosts.
Hunt down 65 wild animals.
Heal five people.
Find 12 pearls.
Find father.
Build or repair 10 structures.
Make 25 sun solutions.
Rest 50 times in a camp.
Pick 45 herbs.
Learn an expert skill.
Find 25 crayfish.
Gather 40 sacks of night flowers.
Become a soldier.
Gather 15 barrels of algae.
Find 30 lost crates and barrels.
Hunt down 25 wild animals.
Own 500 gold coins.
Catch 80 fish.
Find 150 mushrooms.
Have 100 fame.
Get a boat.
Learn an advanced skill.
Finish the water mill.
Learn three skills.
Leave the home farm.
Make a barter.
Saw 10 pieces of wood.
Get a weapon.
Get working tools.