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