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