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