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