The end is nigh. The infected are lurking everywhere and chances of survival are slim. Left 4 Dead focuses on the story of 4 individuals and their harrowing battles against the hordes of the infected that roam the streets. What about other survivors? What would they look like and what kind of deformed monstrosities would they be up against?
Sirens have developed over time to be a potent demoralizer and immobilizer. Their pulsating throat blisters contract as they force air through a modified voice box, emitting a damaging high-pitched squeal that is eerily different from the vocalizations of infected and survivors alike.
It seems that hosts for this strain of infection are usually those who are capable of loud screeches even without modification. Young women are selected more often than anyone else. If you’ve ever seen a beautiful girl screaming her lungs out at a rock concert, you have seen who is most likely to develop into a Siren. The fact that most Sirens are (or at least were) physically attractive and possess a screeching ability has led to their namesake, though to call their song anything but horrifying would be an error.
Noticeable changes to physiology include red air blisters clustered around the throat, the movement of the voice box into closer proximity to said cluster, and oddly enough the removal of the jaw. Aside from adding to the horror of their visage, the removal of the jaw seems to help increase the squeal’s effectiveness. Once air from their powerful lungs is forced through their air blisters and in turn through the voice box the scream that is emitted is dangerously loud and piercing. Not only will this loud noise alert and attract other infected in the area, it will cause temporary damage to the outer and inner ear causing passing deafness and disorientation, often followed by nausea.
Typical Siren behavior revolves around locating prey, screeching and closing in, usually on all fours. Sirens hold low to the ground when in pursuit and offer a quick, small target. Thankfully their host body is not associated with hardiness and thus they are counted among the least durable of the infected. If a Siren is spotted it is recommended that it is destroyed before coming within 30 meters of you or your traveling group. If you see a Siren enter a standing position you should immediatel