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