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