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