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