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