Yes, I have a leisurely interest in vampires. I love vampire movies (the darker, more serious ones like Interview with the Vampire, not spin-offs like Dracula 2000), vampire books and most of all, vampire games. I will not discuss in depth my interest of vampirism or why, I'll reserve that to another post. Below, I'm going to post some stuff about one of my favorite vampire game saga: the Legacy of Kain Series, and I give full credit to Wikipedia for some of the pictures and excerpts I have taken directly from the site.
Legacy of Kain revolves around two characters: Kain and Raziel, both of whom are vampires, but with the latter (Raziel) later being transformed into a spectral being - a vampire who is not quite, and instead of drinking blood, he needs spiritual sustenance (souls) to survive (he can also shift between the physical and the spiritual/spectral planes of existence, his transformation is brought about by the seeming betrayal of Kain, who ordered him killed for a superficial reason by being thrown into a whirlpool of water - which is fatal to vampires in this version of vampire lore). Kain, however, remains a vampire, and evolves as the centuries pass into a more powerful being than he was when he was first "turned." LOK spans 5 games: Blood Omen, Blood Omen 2, Soul Reaver, Soul Reaver 2 and Defiance (both Blood Omen games lets you play as Kain while both Soul Reaver games let you play as Raziel, Defiance has you switching between the two). The thing that draws me most in this game is the compelling story line - which can be a bit confusing. I daresay that it is even better than "Interview" with its plot twists, tragic moments, and vampire lore (the latter does not stick with classic lore, but creates an equally interesting story as to the origins of vampires). The story slowly unfolds throughout the five games, and like a puzzle where all the pieces are scattered throughout the games - you will not be fully aware of the whole story until you play all five games (or four, since BO2 is considered to be inconsistent with the storyline) and thus complete our "puzzle." It is concerned mostly with destiny and even includes prophecies that are fulfilled in ways that are somewhat different from what was expected (even by the "elder" or "wise man" entities in the game), with Kain and Raziel in the center of these prophecies (somewhat like the Star Wars character Anakin Skywalker and how the "Chosen One" Prophecy came to fruition).
The game also somewhat revolves around the Soul Reaver - a legendary sword that has a history almost as deep (or perhaps even deeper) than that of our main characters. The sword has two forms, a Physical form (left) - wielded by Kain, and a Spectral form (known as the Wraith Blade; right) that can only be used by Raziel. The weapon serves as a key to the unfolding events in the story of the game, as the characters gain access to more places and events as they unlock more of the Soul Reavers' (both physical and spectral) powers. The sword is named thus for its ability to devour the souls of its victims (the reason on how it is able to do this is another plot twist in the story). Curiously, Raziel is also sometimes called the "Reaver of Souls" and he shares a symbiotic relationship with his wraith blade. Another important part of the story is the structure called "The Pillars," as the name implies, the pillars are a set of cylindrical structures (9 in all), each one representing an order and aspect/part of existence itself; and each one having a guardian (Kain happens to be fated as the next Balance Guardian, but his destiny is warped by his transformation into a vampire). The Pillars' existence play a pivotal role on the story, and they is necessary to maintain the so-called "balance" in the world of LOK. Below are a summary of the 9 pillars taken from Wikipedia:
Death, being the cycle of life, death and rebirth which the Ancients held sacred.
Conflict, being the interactions of things with other things and the new things arising thereof.
States, being the nature of the physical world and the ordering of the concrete, including chemicals and all the laws governing the physical world, such as electromagnetism and gravity.
Energy, being the vital force which animates creation and allows for the changing of all things.
Time, being the cyclical flow of time and the fated events to take place in order of their happening. (note that in LoK, time is neither dimensional nor directional, but it can be altered, with great difficulty, by one possessing sufficient comprehension of the nature of such a thing)
Dimension, being the dual directionality of the fabric of existence, allowing things which exist to exist and preventing things which do not exist from existing.
Nature, being the growth and evolution of living things, and everything which is animated or can be said to have a soul.
The Mind, being the soul itself, or the soul as it perceives itself, including all psychology, the study of the mind in relation to itself.
And finally: Balance, being the interactions of all the spheres of law, and all things which fall under the auspices of more than one set of laws. Balance governs all of existence through its governship of the laws themselves.
Below is a picture of the pillars and how it is connected with the elements in the world of Legacy of Kain (fire, water, wind, earth, darkness, and light):
Below is an excerpt from Wikipedia on the two main characters and how their actions affect the story:
One of the true innovations of the Legacy of Kain series is the greatly involved storyline, with believable characters, and shifting alliances and betrayals. Nosgoth is a dark fantasy land with an elaborate and involved history, and that history is often revealed in reverse; new information often shows that what is believed to be true is a lie. Furthermore, nearly every major character, or groups of characters, have both aspects of heroism and villainy, even when some aspects seem to shine through more often than others.
Kain himself (left and below), for instances, is a notorious anti-hero in that he is, in fact, not very like-able: he is an unashamedly selfish and brutal megalomaniac, with an obvious relish for bloodshed; though he is not stupid, and while his quite undiplomatic actions might often seem to be the rash products of his rather short and violent temper, it more often turns out that his rage is merely a tool carefully cultivated, revealing his true cunning and subtlety only to those perceptive enough to be his intellectual equals. With his vampirism, coupled with his learnedness, cultured palate and his extremely aristocratic tastes, he could best be described as a cross-over between Hannibal Lecter and Vlad the Impaler; however, his justification is often thrust upon him in that he usually finds himself, usually by his own designs, in such a position that he becomes the lesser of two evils, and one often feels a sense of justice to see the true enemy get what they so richly deserve by falling to the mercy of his better graces.
Raziel (right and below), on the other hand, is an anti-hero only in the opposite sense. He is a very upstanding and noble man, with a strong inherent sense of morality; however, the conditions and situations he finds himself in (almost never of his own making, unlike Kain who, though sometimes momentarily taken by surprise, often makes his own destiny for good or evil through defiance of those around him) rarely lend themselves to unambiguous ethical judgments and he often ends up doing the wrong thing for the right reason (unlike Kain who generally does the right thing for diabolic and selfish reasons). As a mortal man, he engaged in the systematic extermination of countless "innocent" Vampires in his fanatical quest to rid the world of evil. As a Vampire he helped Kain establish his empire, under the misguided belief that Vampires deserved (as a higher form of life and thus knowing better) to rule the world; and as The Soul Reaver, he stalked Kain and slaughtered his former brethren, under the belief that he was not only exacting vengeance, but also setting the balance of existence. Ultimately, all his actions turn out to be in some way flawed and generally immoral in the logic or lack thereof in their formulation, as he often finds himself the willing or unwilling pawn of those around him, for good or evil. His systemic redemption is found only in his final act, one of self-sacrifice, his only 
action dually motivated by good intentions and with arguably good consequences. This puts him in harmonic opposition to the character of Kain, whose actions are always selfish, but generally turn out to be right, because he betrays and defies those around him, most of whom turn out to be directly or indirectly in league with evil.
There you have it, a little taste of one of my absolute favorite games to date, if you are somewhat interested in learning about the story, try checking out Wikipedia.org and searching for Legacy of Kain, or try www.nosgoth.net for more info on LOK (although given the somewhat gothic nature of this game, I doubt there will be many who will be interested except those with specific tastes). It is unknown if there will be a sixth installment of the game, as there are still unanswered questions in the story... Well, I'm keeping my fingers crossed.