Here is the full list of all 34 Ashen achievements.
Wear each relic once.
Wear the Umbral Veil.
Defeat the Elder Dark Sissna.
Defeat the brute near Vagrant's Rest.
Hunt a squork.
Acquire all lanterns.
Discover the secret of Contemplation.
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.
Complete Eila's journey.
Hunt the corb near Vagrant's Rest.
Construct all houses in Vagrant's Rest.
Hunt a roamar.
Unlock all crafting specialities.
Travel the shadow pathways.
Defeat the Listener Matriarch.
Meet Kol the wildman.
Take a ride in Eila's barrel.
Defeat Touma and Souma.
Free the Diasora pup.
Hunt a Deer.
Defeat the Elder Dark Ukkoto.
Hunt a rafet.
Claim Vagrant's Rest.
Defeat Sissna in the Children of Sissna mode.
Defeat the Elder Dark Riak.
Defeat Riak in the Children of Sissna mode.
Acquire all Kol's armors.