Here is the full list of all 13 NECROPOLIS: A Diabolical Dungeon Delve achievements.
Slay an enemy using a power attack.
Die for the first time.
Escape the Necropolis.
Traverse down a Level without using an elevator.
Recover your first Codex.
Survive longer than your average dungeon delver.
Find and equip a new suit of armor.
Eat or drink an unidentified item.
Die from a trap.
Craft your first item.
Recover all Codexes.
Obtain fifteen thousand gems.
Learn to craft everything.