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