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