Here is the full list of all 34 Hero Tale achievements.
Leave the Town
Slay the Unicorn
Get all the final rewards
Finish the game once
Bring father 12 daddy juices
Talk to Witch 69 times
Discover the darkness within you
Find all hidden coins
Slay Leviathan
Beat Enemies from Abandoned Bastion
Beat Prince using Sir Stick
Reveal every enemy loot
Lern heal having 4 spells already
Win a duel with the captain on the first try
Buy all training from captain
Unlock 1000 backpack slots
Defeat the harpies before leaving the city
Reach 100 overall Ranged
Reach 100 overall Combat
Reach 130 overall Magic
Master all spells
Fill every equipment slot
Drink 12 Dad's Juices
Visit every store in the game
Finish game without spells
Finish game without dying
Reach the Deamon lands without killing innocent animals
Listen to all the Druid's sayings
Defeat Brawlhopper bare handed
Defeat Sensei before he hits you
Equip all plate armour
Unlock all skills on tree
Defeat the final boss using Wooden Sword
Play the game 10 times