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