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