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