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