Here is the full list of all 34 ASCENXION achievements.
Defeat the Overseer.
Defeat Chronosis.
Defeat Time Dominator.
Discover the first hidden area.
Discover the second hidden area.
Discover the third hidden area.
Defeat Colossus.
Defeat the Basilisk.
Defeat the Blademaw.
Defeat the Warped Hydra.
Defeat the Harrier Trio.
Defeat the Blitz Crusher.
Defeat the Heart of the Forge.
Defeat the Circle of Binding.
Defeat the four Guardians of the Sanctuary of Light.
Defeat the Guardian of Light
Defeat the Sorcerer.
Uncover all the secret areas, and defeat the Sorcerer while having all halidoms equipped.
Surpass 50% extra attack speed with items.
Surpass 50% extra ATK with items.
Equip 4 drone items simultaneously
Surpass 60% energy regen rate with items.
Surpass 75% skill damage with items.
Equip the Monster's Venomous Fang.
Remove the seal from the Book of Spirits.
Equip a fire-type item and a freeze-type item at the same time.
Craft 6 items.
Craft 4 blueprint items.
Disassemble 10 items.
Obtain the Executioner's Scythe.
Own 1000 souls.
Own 50 rune fragments.
Surpass 50% extra DEF with items.
Defeat the Twisted Guardian.