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