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