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