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