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