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