Here is the full list of all 32 Elderand achievements.
Defeat the Chaos touched reject trio
Perform all rituals
Explore 100% of the map
Purge all evil
Defeat Dan’nuhrr
Perform a special attack for the first time
Kill 50 Mysterious Mourner
Defeat Amon
Win in the arena mode
Refine an equipment to the max
Collect 30k gold
Defeat Erik Zan
Save Eloria
Forge the Glimpse of the titan
Defeat Elderu'tamah
Help Eran
Defeat Black Virtue
Upgrade your equipment for the first time
Find Pascal's hammer
Free Elderu'tamah
Defeat Sserthris
Defeat the Chaos touched reject
Unlock the fast travel
Make a potion for the first time
Defeat Rok'naar
Help Guam
Defeat Shakna
Get to level 100
Defeat Eloria
Take the throne
Put an end to the cult
Collect all the notes