Here is the full list of all 42 DreadOut achievements.
Playing DreadOut on Thursday night
It's a cute way to die
Took a picture of Gundul Pringis
Dial the correct number
Finished DreadOut
Thank You
Endured all the scary moments on DreadOut so far
Reached an alternate ending
Found the secret of the mansion
:P~
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
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
Collected all special items
Took a picture of the cat
Trapped alone
Took a picture of Pocong on a motorcycle
Took a picture of UFOs
Took a picture of Genderuwo
Stay scanning for ghosts
Found an article
Took a picture of Shakira Irawati
Entered Limbo
Took a picture of a ghost
Travelled for a long distance
Added any picture to the gallery
Finished the game without entering Limbo in Act 1
Collected all ghost pictures
Took a picture of Betsy
Playing DreadOut with convenience
Playing DreadOut without any clues
Resistance is futile against the hand of fate