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