Full list of all 27 A Walk in the Dark achievements worth 1,000 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox One.
Led Bast to death 100 times
Killed Arielle on her first level while she's descending
Disturbed 10 butterflies
Led Bast to death 7 times
Destroyed 30 dandelions
Completed a level under the par time
Caught your first Shiny
Lead Bast to death 1000 times
Catch 25 Shinies
Catch 50 Shinies
Catch 75 Shinies
Catch all 100 Shinies
Complete 25 levels under the par time
Complete 50 levels under the par time
Complete all timed levels under the par time
Complete a Cave level without dying
Complete all Cave flipper levels without dying
Catch all shinies, complete all timed levels under the par time and all Cave levels without dying
Complete all levels
Complete all levels in a unique speed run without dying more than 10 times
Complete all Cave levels
Complete all Forest levels
Complete all House levels
Complete all Spirit World levels
Complete all Strange World levels
Clean all smoke blocks in a level
Complete all challenge levels