Here is the full list of all 57 Hero of the Kingdom III achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Achieve 140 fame.
Defeat Earthquaker.
Kill 300 monsters.
Make 600 various potions.
Get the lockpicking skill to 100.
Get the combat skill to 100.
Get the smithing skill to 100.
Make 80 weapons or shields.
Pick 60 locks.
Find 24 pearls.
Mine 50 pieces of silver ore.
Visit the Azure Valley.
Destroy all of the orc camps.
Cook 8,000 food.
Find 400 eggs.
Get the mining skill to 100.
Mine 50 pieces of iron ore.
Find 120 lost crates and barrels.
Make 10 swords.
Get the cooking skill to 100.
Find 800 mushrooms.
Hunt down 150 wild animals.
Pick 300 flowers.
Have 5,000 gold coins.
Get the alchemy skill to 100.
Make 100 healing potions.
Get the fishing skill to 100.
Hunt down 20 foxes.
Achieve 70 fame.
Have at least 1,000 strength.
Pick 15 locks.
Get the herbalism skill to 100.
Get the archery skill to 100.
Learn the mining skill.
Learn the smithing skill.
Visit the Gray Valley.
Kill 150 monsters.
Cook 2,000 food.
Learn the lockpicking skill.
Have 1,000 gold coins.
Gather 100 berries.
Catch 100 fish.
Save the mayor of the Yellow Valley.
Learn the alchemy skill.
Learn the herbalism skill.
Find 30 lost crates and barrels.
Visit the Yellow Valley.
Find 100 eggs.
Catch a golden fish.
Find 200 mushrooms.
Find 6 pearls.
Kill 50 monsters.
Hunt down 20 rabbits.
Have at least 100 strength.
Find some treasure.
Learn the fishing skill.
Learn the cooking skill.