Full list of all 24 Outlast 2 achievements worth 1,000 gamerscore. It takes around 40-50 hours to unlock all of the achievements on Xbox One.
Performed a twelve-meter blood slide
Spent 10 minutes underwater
Finished the game
Witnessed the end
Reunited with Lynn
Descended into the mines
Reached the mine facility
Completed 30 recordings
Escaped from the Scalled
Used 10 bandages
Escaped the crucifixion
Saw the distant mines where Lynn was taken
Used the microphone for 20 minutes
Found Lynn
Collect 40 documents
Collect all documents
Finish the game in Hard Mode
Finish the game in Nightmare Mode
Finish the game in Insane Mode
Finish the game without hiding in a barrel or closet
Finish the game in Insane Mode without reloading the camera battery
Finish the game in under 4 hours
Crawl for 500 meters
Complete all recordings