Here is the full list of all 34 9 Years of Shadows achievements.
Acquire all of the progression abilities.
Upgrade your Light Bar to the maximum.
Break the curse.
Upgrade your Vitality to the maximum.
Find all eight cartographer's journals.
Allow Hibino to complete his mission.
Complete the bestiary.
Defeated the Logon Duck in the Upper Quarters.
Rescue all of the musicians.
Defeat the Horned God.
Defeat Draythus in The Orphanage.
Defeat Limo and Nissi.
Defeat Link.
Defeat Miria.
Defeat Maelzel.
Save Talos' Heart in Talos Core.
Defeat Locrian Sentinel in Talos Core.
Defeat the Reaper.
Defeat Ulf.
Defeat Frinise.
Find ten secret rooms.
Defeat the Gear of Erebus.
Defeat the Shadow of Demise.
Defeat the Mask of Andros in the Eucalyptus Garden.
Defeat Hekate's Illusion in the Capra Cauldrons.
Defeat Leno.
Defeat Issa Kabeer.
Defeat the Shadow of Despair.
Successfully perform four quick heals with Radical Acceptance in a row.
Defeat the Tantalus Roach in the Forgotten Pond.
Defeat the Shadow of Hope.
Defeat the Dwarven Guard.
Kill the same common enemy ten times.
Perform a Lullaby for the first time.