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