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