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