Here is the full list of all 31 Ultros achievements.
Uncover every part of every area on the map.
Grow a plant that combines elements from all different plant species.
Lead plants into the great refinery hall for Brunzon to discover.
Feed the Gluttonous Feastro
Give the Host new input to analyze.
Watch all Vistas.
Connect the three Dorok sisters.
Fully upgrade the Extractor
Gather one specimen of every critter's non-battered guts, twelve in total, in one juicy pile.
Gather one specimen of every fruit, ten in total, in one juicy pile.
Escape Entrance without sword.
Take the non-violent path towards awakening Ultros.
Connect the Shaman in Pantheon of the Stars.
Connect at least one of each plant species to the living network.
Connect the Shaman in Vasa's Legacy.
Take the violent path towards awakening Ultros.
Bring the sword statue to a standstill.
Defeat Higher Suggajof Brunzon.
Connect the Shaman in Geggamoja Refinery.
Connect the Shaman in Gärdner's Garden.
Connect the Shaman in Rotten Orchard.
Feed the Enraged Moth Beast.
Connect the Shaman in Infinity Lake.
Defeat the three Dorok sisters.
Defeat the parasitical Host.
Connect the Shaman in Temple of Motherhood.
Unlock all cortex skills.
Defeat the Gluttonous Feastro.
Defeat Vasa, the Huntress.
Kill an enemy with another enemy.
Defeat the Enraged Moth Beast.