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