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