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