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