Here is the full list of all 42 DreadOut achievements.
Playing DreadOut without any clues
Resistance is futile against the hand of fate
Finished the game without entering Limbo in Act 1
Stay scanning for ghosts
Thank You
Finished DreadOut
Playing DreadOut with convenience
Reached an alternate ending
Collected all ghost pictures
Found the secret of the mansion
It's a cute way to die
:P~
Took a picture of Gundul Pringis
Took a picture of Palasik
Deal with Suzzie
Dial the correct number
Solved the mistery of the crying widow
Collected all articles
Listen to her story
Banish many Pocongs in single shot
Solved graveyard puzzle
Acquired the Camera
Took a picture of Betsy
Collected all special items
Took a picture of Genderuwo
Took a picture of Pocong on a motorcycle
Took a picture of UFOs
Playing DreadOut on Thursday night
Endured all the scary moments on DreadOut so far
Solved all puzzles
Left the school
Travelled for a long distance
Defeated the school principal's ghost
Solved a puzzle
Took a picture of Sundel Bolong at the school cafeteria
Took a picture of the cat
Entered Limbo
Took a picture of a ghost
Added any picture to the gallery
Trapped alone
Found an article
Took a picture of Shakira Irawati