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.
Find all eight cartographer's journals.
Break the curse.
Upgrade your Light Bar to the maximum.
Allow Hibino to complete his mission.
Defeated the Logon Duck in the Upper Quarters.
Rescue all of the musicians.
Defeat the Reaper.
Upgrade your Vitality to the maximum.
Acquire all of the progression abilities.
Defeat Draythus in The Orphanage.
Defeat the Gear of Erebus.
Defeat Link.
Defeat Maelzel.
Defeat Miria.
Find ten secret rooms.
Defeat Limo and Nissi.
Save Talos' Heart in Talos Core.
Defeat the Horned God.
Defeat Locrian Sentinel in Talos Core.
Defeat Frinise.
Defeat the Shadow of Demise.
Defeat Hekate's Illusion in the Capra Cauldrons.
Defeat Issa Kabeer.
Defeat the Shadow of Despair.
Defeat Leno.
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.
Kill the same common enemy ten times.