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