Shadows of the Damned
50 Achievements
1,000
15-20h
Ghost Hunter
Story Progression in Act 4 - Chapter 3 (any difficulty setting)
15
How to unlock the Ghost Hunter achievement in Shadows of the Damned - Definitive Guide
Don't forget to back track through the library to get a red gem: start by the now-open door and hugging the left wall all the way to the other side.
You then need to follow the path past the upgrade demon and collect the brain at the end, fighting off a couple of waves of crawling demons along the way. The brain opens the baby gate, walk through to get the cheevo to pop.
Story related. Cannot be missed. Unlocks upon completing Act 4-3.
To defeat the teleporting demons, you must blow up the poles around the library with your Hot Boner. Once you've unloaded your sticky hot load into each stone, you'll nullify the electricity surrounding their bodies, allowing you to finish them off. Back away from them as soon as you do though, as they'll blow themselves up, electric force field style.
You'll eventually stumble upon a puzzle. You'll need to rearrange the shelves with your Light Shot, so that the balcony from the right connects to the left. The opening for the balcony to your right is on top, and the opening for the balcony on your left is on the bottom.