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