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