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