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