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