Here is the full list of all 70 Tyranny achievements.
The base game contains 50 achievements, and there is 1 DLC pack containing 20 achievements.
Slay all who would willfully trespass the Oldwalls in the Bastard's Wound.
Complete Barik's Companion Quest
Complete Lantry's Companion Quest
Complete Verse's Companion Quest
Complete all available quests and sidequests in the Bastard's Wound.
Slay a foe with a slab of meat.