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