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