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