Here is the full list of all 15 DreadOut 2 achievements.
Finish Act 0
Finish Act 1
Finish Act 2
Finish Act 3
Finish Act 4
Finish Act 5
Finish Act 6
Complete Mona's Urban Legends
Complete "Ghost Rider"
Complete "The Bloody Love Story"
Complete Ghostpedia Entries
Visit All Locations
Talk to All Ghost NPCs
Stun (?) Ghosts
Backstab (?) Ghosts