Appearance: Looks like a humanoid made of wire. Characteristics: Hostile. Usually only appears in Level 0 (The Lobby). When it spots a human, it attacks while emitting a terrifying, scream-like sound. It has no eyes or mouth. It is the remains of a human who wandered into the Backrooms and lost their mind. Cannot speak. Cannot open doors.

Appearance: Its mouth is split vertically from the nose down to the abdomen. Characteristics: Hostile. It wears human skin to mimic people and attacks when it finds an opening. How to identify: It cannot hold a coherent conversation, its blood is transparent, and it is unusually tall.

Appearance: ??? Characteristics: Hostile. Appears in the dark and hates light. It has a tendency to attack light sources. Since it only appears in darkness, only its grinning mouth and glowing eyes are visible. Cannot speak.

Appearance: Looks like a dog with a human face. Characteristics: Hostile. If bitten by a Hound, the victim becomes infected and turns into one. Cannot speak but barks. Weak to light; it will flinch and flee if a flashlight is shone on it.

Appearance: They take the form of men, women, and children of all ages. Adult females look like Sadako. Characteristics: Adults are friendly and helpful, but the child versions will try to kill you. Cannot speak. Their faces are completely blank (no-face) regardless of age or gender.

Appearance: Entire body is yellow. Eyes are vertical slits and the mouth is like a slit-mouthed woman, but its hands are also mouths. Characteristics: Hostile. Psychopathic; they make things like human-flesh cakes. Holds a red balloon in the left hand. They share a hive mind; if one finds a human, they all attack. Only found in Level FUN. Cannot speak.

Appearance: Looks like a moth. Characteristics: Hostile. Females are massive and can carry a human, while males are small like real-world moths and swarm together. Females are hostile, but males are harmless. Cannot speak.

Appearance: Not clearly known; only visible as a black silhouette. Characteristics: Hostile. It stays behind windows and taps on the glass to lure humans. When a human gets close, it breaks the glass, reaches out, and pulls them in. Cannot speak.

Appearance: Looks like a black spider with an animal skull for a head. Characteristics: Hostile. Attacks from the ceiling. Large body. Cannot speak.

Appearance: Looks like a mass of tangled human limbs with a large mouth. Characteristics: Hostile. Cannot speak. It lures humans in by extending a single hand before attacking.