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.
Find 300 mushrooms.
Find 140 eggs.
Find 60 lost crates and barrels.
Destroy the Dark Lord.
Help two ghosts.
Find 12 pearls.
Catch 160 fish.
Find 12 treasures.
Make 25 sun solutions.
Gather 40 sacks of night flowers.
Pick 45 herbs.
Hunt down 65 wild animals.
Rest 50 times in a camp.
Have 350 fame.
Own 5,000 gold coins.
Heal five people.
Fight 12 battles.
Gather 15 barrels of algae.
Find father.
Catch 80 fish.
Build or repair 10 structures.
Learn an expert skill.
Find 25 crayfish.
Find 30 lost crates and barrels.
Become a soldier.
Hunt down 25 wild animals.
Have 100 fame.
Find 150 mushrooms.
Own 500 gold coins.
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.