Here is the full list of all 11 STRANGER achievements.
Completed all levels in Campaign
Survived Night 1
Completed all small house levels
Completed all family home levels
Survived Night 1 Family Home
Survived 5 Nights on any difficulty/map
Survived 15 Nights on any difficulty/map
Modded STRANGER using easy to mod system!
Picked up the PermaLock on either level
Survived nightmare mode any difficulty
Play any hallways difficulty..