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