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