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