Full list of all 34 Ashen achievements worth 1,137 gamerscore. It takes around 50-60 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 31 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 3 achievements worth 137 Gamerscore.
Defeat the Elder Dark Sissna.
Wear the Umbral Veil.
Wear each relic once.
Meet Kol the wildman.
Reunite the Listener and Human hearts.
Complete Flokir's journey.
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.
Complete Vorsa's journey.
Discover the secret of Contemplation.
Defeat the brute near Vagrant's Rest.
Complete Eila's journey.
Acquire all lanterns.
Construct all houses in Vagrant's Rest.
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.
Free the Diasora pup.
Defeat the Elder Dark Ukkoto.
Hunt a squork.
Claim Vagrant's Rest.
Hunt a deer.
Hunt the corb near Vagrant's Rest.
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.