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