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