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