3. Witch (Left 4 Dead)

The infected human known as the witch is the only time you should avoid helping a crying half naked mourning woman.

Nearly immune to the onslaught and chaos of her fellow zombies dying around her, the witch only reacts to an uninfected human proximity, damage or light.

Once startled the witch mercilessly hunts the human who startled her and viciously attacks with sharp claws. Her familiar cry and shriek nearly always precedes at least one character death. Her speed is far greater than the average infected so make sure to avoid the witch at all costs, because running is not an option.