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