Here is the full list of all 13 NECROPOLIS trophies - there are 9 bronze, 3 silver and 1 gold.
Traverse down a Level without using an elevator.
Escape the Necropolis.
Die to a trap.
Find and equip a new suit of armor.
Recover your first Codex.
Die for the first time.
Survive longer than your average dungeon delver.
Craft your first item.
Eat or drink an unidentified item.
Slay an enemy using a power attack.
Recover all Codexes.
Obtain fifteen thousand gems.
Learn to craft everything.