Here is the full list of all 40 Dragons Dungeon: Awakening achievements.
Kill the 100 monsters
Kill the 500 monsters
Kill the 900 monsters
Reach 20 level, playing for the thief
Reach 20 level, playing for the wizard
Reach 20 level, playing for the warrior
Reach 20 level, playing for the paladin
Reach 20 level, playing for the necromancer
Reach 20 level, playing for the demoness
Reach 20 level, playing for the dryad
Reach 20 level, playing for the dwarf
Complete all the quests in the damned rock
Complete all the quests in the dark forest
Complete all the quests in the grim castle
Complete all the quests in the mysterious pyramid
Complete all the quests in the ice trap
Penetrate the dragon nest
Kill the dragon in the damned rock
Kill the dragon in the dark forest
Kill the dragon in the grim castle
Kill the dragon in the mysterious pyramid
Kill the dragon in the ice trap
Kill the Dragon Lord
Collect 100 coins
Collect 500 coins
Collect 999 coins
Brew a potion from a alchemist
Create an item from a blacksmith
Loses possession pirate 5 times in a row
Buy 10 items in the store
Collect 100 crystals
Collect 250 the items
Die 10 times
Kill 100 chickens
Kill rare monster
Play for each character
Explore 6 skills
Collect 40 obelisks for one game
Get 5 points of development from elder
Unlock all locations