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