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.
Help two ghosts.
Find 140 eggs.
Have 350 fame.
Fight 12 battles.
Find 300 mushrooms.
Pick 45 herbs.
Hunt down 65 wild animals.
Catch 160 fish.
Find 60 lost crates and barrels.
Find 12 treasures.
Rest 50 times in a camp.
Gather 40 sacks of night flowers.
Make 25 sun solutions.
Catch 80 fish.
Gather 15 barrels of algae.
Find 12 pearls.
Heal five people.
Hunt down 25 wild animals.
Find father.
Find 30 lost crates and barrels.
Build or repair 10 structures.
Learn an expert skill.
Find 25 crayfish.
Own 5,000 gold coins.
Own 500 gold coins.
Find 150 mushrooms.
Become a soldier.
Have 100 fame.
Learn an advanced skill.
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.