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