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