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