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