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