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