Here is the full list of all 10 A Dump in the Dark achievements.
Take a diarrhea dump.
Dash the clown to the rocks.
Feed Baby Edward a Gribble.
A poisoned bottle, a sleeping prince.
Survive a night of Ghasts.
Trip your Grandmother down the stairs.
Defend the Pit until Latrine is reformed.
End the war early and save millions.
Refrain from murdering your wife!
Birth a free future.