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