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