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