Here is the full list of all 20 9th Dawn II achievements.
Kill 5000 enemies
Let a summon kill a boss
Get 1,000,000 Silver
Collect 100 items in your bank
Talk to 100 NPCs
Collect 5 Crystal Beans
Cast a summon spell
Kill 1000 enemies
Cast a healing spell
Find plenty of treasure chests
Kill a boss with 10% HP remaining
Become over-burdened
Kill 100 enemies
Unlock your first spell
Find all locations
Kill the Hydra Dragon
Complete the game
Unlock all spells
Kill a Dragon
Drink 200 potions