The Black Dog is an enemy in Afraid of Monsters: Director's Cut. It has the pitch black body of a dog, and a grotesque human head with a single, bloodied eye socket in the center.
It will quickly bound towards the player until it is in proximity to release an explosive shock wave attack.
It is usually encountered in packs, where they will try to surround the player and inflict massive area of effect damage.
It is functionally similar to the Houndeye in Half-Life.