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