Here is the full list of all 24 The Weaponographist achievements.
Topple a seven story murderer.
Massacre 300 demons in a single combo.
Unlock one jinx by playing Survival.
Reach and clear Room 30 on Survival Mode.
Destroy an angry marionette before it self-actualizes.
Attain a 100 kill combo.
Attain Exp Level 5.
Collect two Health Runes in the same playthrough.
Collect 10,000 Goop at one time.
Improve your leaderboard time for any level.
Raise one weapon to its current level cap.
Dispatch a Terrible Lizard from the past. (Future?)
Attain your first checkpoint.
Crush an ice wizard who was really only looking for a friend.
Banish the menace behind the dungeon.
Rack up 200 kills in a single combo.
Get to Exp Level 8.
Raise one weapon to its absolute peak.
Collect 100,000 Goop at one time.
Beat one Depth on Hardcore.
Beat all Depths on Hardcore.
Unlock three jinxes by playing Survival.
Unlock all jinxes by playing Survival.
Reach and clear Room 10 on Survival Mode.