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