Full list of all 67 Days Gone achievements. It takes around 80-100 hours to unlock all of the achievements in the base game on Windows.
The base game contains 61 achievements, and there is 1 DLC pack containing 6 achievements.
Defeat an increased size horde in Horde Assault
Beat the target score for all levels in Horde Assault
Survive Horde Assault for 15 minutes
Achieve max level in Horde Assault
Complete the story of Days Gone in Permadeath Mode on any difficulty
Find something important to Deacon that was thought lost