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