Here is the full list of all 34 Ashen achievements.
Defeat the Elder Dark Riak.
Acquire all Kol's armors.
Hunt a squork.
Wear each relic once.
Wear the Umbral Veil.
Hunt a rafet.
Defeat the Elder Dark Sissna.
Complete Flokir's journey.
Reunite the Listener and Human hearts.
Leap into the dark portal.
Unlock all townsfolk outfits.
Defeat the Shadow of the Ashen.
Complete Vorsa's journey.
Complete Jokell's journey.
Untangle Sissna's weave at the Palace of Lathyrus.
Acquire all lanterns.
Complete Eila's journey.
Construct all houses in Vagrant's Rest.
Hunt a roamar.
Claim Vagrant's Rest.
Defeat the Elder Dark Ukkoto.
Defeat the Listener Matriarch.
Free the Diasora pup.
Unlock all crafting specialities.
Defeat the brute near Vagrant's Rest.
Hunt a Deer.
Discover the secret of Contemplation.
Meet Kol the wildman.
Hunt the corb near Vagrant's Rest.
Take a ride in Eila's barrel.
Defeat Touma and Souma.
Travel the shadow pathways.
Defeat Sissna in the Children of Sissna mode.
Defeat Riak in the Children of Sissna mode.