Ghasts are flying ghost-like creatures which live in the Nether and shoot fireballs at their enemies. they make "crying" noises while flying.
The Haunting: Second Life
These creatures make an appearance when Drake and Armen traverse through The Nether, trying to find a way out of the rough, lava-filled dimension.
The Haunting: Shadow of Herobrine
Belly of the Beast
These creatures once reappear in the series when Drake and Grayson walk through the dimension, collecting loot along the way while following some strange beacons.