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