Here is the full list of all 49 Death Must Die achievements.
A cat dies 9 times
Not a scratch
Win an attempt as Lorien using the Bask in Greatness talent
Win an attempt as Lorien using the Whistling Arrow talent
Lose an attempt as Lorien
Level up to 40 as Lorien
Defeat The Insect Queen as Lorien
The magic of friendship
A stake for a vampire
Win an attempt as Avoron using the Light Rays blessing from Lady Justice
Travel to 40 different locations in an attempt as Avoron.
Win an attempt as Front using the Rampage talent
Defeat The Djinn as Front
Instant bash
A d20 of 400
Win an attempt as Skadi and her wolves
Win an attempt as Skadi with Darkness
On the hunt for a bat
33 Sync-Ups
Win an attempt as Merris using the Telekinesis talent
Win an attempt as Merris using the Charged Field talent
999 Bandages
Number go up to 30
4 Times jumper
Win an attempt as Nixi using the Endless Night talent
Win an attempt as Nixi using the Mind Reaper talent
Do not take the purple bait
Kill 1000 Skeletons as Lorien
Traverse 50000 distance as Lorien
Get 8 visual effects
Time travelling twice for victory
I need 40 good men
5 Lamps to turn off
What we do in the 10th shadow
I don't need no handouts
Defeat the Baron
20 Seconds for two bats
100000 Wounds Inflicted
50 Summoning orders
300 Steps
I wield the 5 elements
4000 Pounds of jelly
Stop the evil old man
50 Shields for my wall
25 With a single blow
A red and a blue bat
6000 Bones to pick
500 bones under the sword
A total of 2000 natural 20 damage