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