Full list of all 43 Death's Gambit achievements.
The base game contains 34 achievements, and there is 1 DLC pack containing 9 achievements.
Slay the Owlking
Slay the Soul of the Phoenix
Slay the Tundra Lord
Slay the Bulwark
Slay Origa
Slay the Forgotten Gaian
Slay the Dark Knight
Slay Bysurge
Slay the Eldritch Council
Escape Thalamus
Slay Endless
Slay Cusith
Slay Amulvaro
Slay the Owlking in heroic
Slay the Soul of the Phoenix in heroic
Slay the Tundra Lord in heroic
Slay the Bulwark in heroic
Slay Origa in heroic
Slay the Forgotten Gaian in heroic
Slay the Dark Knight in heroic
Slay Bysurge in heroic
Slay the Eldritch Council in heroic
Slay Endless in heroic
Slay Cusith in heroic
Slay Amulvaro in heroic
Defeat 12 bosses in Heroic
Obtain all 7 feather upgrades
Execute a parry
Recover all boss journals
Unlock 14 talent points
Die 50 times
Enchant a weapon or equipment to +10
Slay the Owlking boss using only kicks
Kill the final boss without quitting the game and in under 4 hours from starting the game and without leveling up.
Slay the Aberrant AI
Slay the Grey Mage
???
Slay Wrath King Sirad
Slay Heroic Grey Mage
Slay Heroic Wrath King Sirad