Here is the full list of all 30 Polaroid achievements.
Successfully survive Phase One
Successfully survive Phase Two
Successfully survive Phase Three
Escape the Optical
It's really not...
Collect all 6 notes
Watch all 3 hidden VHS tapes
Escape the Optical in Hard Mode
Print out 240 photos
Survive the Hide and Seek section
Find the Daycare
Pet the cat in the Cabins
Kill Hider
Escort the child to his mother
Eat all of the moldy bread in the Cabins
Kill all of the shadow people in the Cabins
Print out 60 photos
Print out 120 photos
Did you expect lore??
Complete the Sewers section
Collect all 3 ladder pieces
Complete Chapter One
Complete Chapter Two
Complete Chapter Three
Complete Chapter Four
Complete Chapter Five
Run out of film in your Camera
Patch yourself up after losing health
Hop onto the rollercoaster
Restore the power to the Apartments