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