VAMPIRES
Vampires have long had a bloody stake in history. They can trace their birth to when the Old Ones forcibly mated with humans, giving them their blood in a desperate attempt to increase their lessening numbers. Soon the vampires arose, a unique demon hybrid. Although vampires keep themselves from being known to the general population, throughout history human beings have discovered their presence, although their claims about their being have been dead accurate to preposterous due to mass hysteria. In Europe, at the height of vampire fear, they were called various different things, as vampir (Serbian), vrykolakas (Greek), jiāngshī (Chinese), and strigoi (Romanian).
The vampires in the game are very much like the vampires in legend, save for the fear of running water, garlic, silver, and a penchant for coffins. A constant question that plagues the vampires is: do they actually have souls? As they are technically dead, the slayer and hunters vehemently say no, these are undead creatures with no soul and conscious, vicious things that have to be put down. However, the vampires that actually do care about this debate will say otherwise.
As for surviving, naturally, all vampires need to drink blood. They are capable of devouring human food and drink, but to truly live, they need blood to sustain their reanimated bodies. Human blood, with its life force is typically the food of choice, but some opt for animal blood instead, although it is said to be less satisfying and thinner than humans'. As for other demon and supernatural blood, vamps tend to stay away. Faeries and witch blood disorient them, however some acquire a strong taste for it, as it can have narcotic-like effects.
Since vampires are technically dead they do not give off brain waves therefore telepathic people and faeries cannot hear their thoughts. That doesn't mean they don't have them because they do just as much if not more then any human, it just means they don't have brain waves.
STRENGTHS AND WEAKNESSES
As vampires are technically demons, they have the traits of their brethren. Super speed, strength, and advanced healing. They have enhanced senses, especially sight and smell, for spotting prey. Older vampires increase in power and senses, and will lessen in human appearance, looking more demonic as they age. When they're in vamp mode their fangs (two on each side) grow and their eyes darken intensely.
However, vamps cannot go more than one week without feeding. Although they can walk into churches and other places of worship, they are repelled by holy relics; crosses and holy water will burn them. They have no reflection, although they can be photographed; additionally, they have no breath, and their skin will always be cold to the touch except just after feeding. Sunlight will set these creatures of the night on fire. To kill them - a wooden stake to the heart, beheading, fire, or a bullet to the heart or brain by a UV-ray bullet. At the moment of their second death, their body will instantly turn into ash.
BIRTH/SIRING
Being turned into a vampire is called either being sired or "turned". Most vampires are very choosey as to who they sire but some are careless and do to further increase their numbers. When a vampire sires a human they start by drinking most of their human blood, leaving them barely hanging onto life. They then cut or bite a wound (most often their wrist) and let their own blood dribble into the human's mouth. Vampire blood taste bittersweet to a dying human and it's almost impossible to resist. After the human drinks a sufficent amount his or her body will die, aka become a lifeless corpse. It then takes seventy-two hours or three full days for the transformation to be complete. Burying the body in a coffin in the earth is useful but isn't nessecary. A newborn vampire is a lot more ravenous and crazed then the older ones since they have not learned to control the thirst.