Here is the full list of all 17 Disavowed achievements.
Defeat the psychopathic guard of the Plush Kingdom
Defeat the general of the pillow army
Beat the game in under 60 minutes
Defeat the construct who silences all who oppose the Tinkerer
Defeat the protective mother of the Weaver Tree
Exact your revenge
Defeat the one who rejected you
Listen to all of Trash Man's tips
Beat the game with out picking up HP nodes or buying any items
Make your first purchase at the Trinkiteer
Purchase all items from the Trinkiteer
Successfully turned all the targets in 5-4 green in one shot
Obtain the stun shot
Obtain all HP upgrades
Obtain the first HP upgrade
Equip your first item
Return to your place of rejection