Early Life
In the mid 1450s, Adrian Tepes was born to Vlad Dracula and Lisa Tepes. As the offspring of an unnatural bond between a human mother and a vampire father, he was born a "Dhampir" or half-vampire. Because of this, Adrian had special powers and was destined to be stronger than any human but not potentially as strong as his father. Nearly twenty years later, in 1475, Lisa was falsely accused of witchcraft and burned at the stake by the Bishop of Targoviste. This tragic event drove Dracula into a rage as he vowed to wipe all human life from the face of the earth in revenge for his wife's death.
Upon learning that Dracula had begun summoning demons from Hell to slaughter all humans, Adrian confronted his father, begging him not to kill innocent people for revenge, as it would not be what his mother Lisa wanted. When Dracula refused to listen, Adrian fought his father but was defeated, leaving him with a large scar on his chest. Beneath the city of Gresit, Adrian placed himself inside a coffin to recover his strength. A legend about him then spread, stating that a "sleeping soldier" awaited beneath Gresit and that he would be met by a hunter and a scholar.
The Sleeper Awakens
In 1476, Adrian, now going under the name Alucard (I.E.: the opposite of Dracula), was awakened from his slumber beneath Gresit by Trevor Belmont, of the famed Belmont Clan of vampire hunters, and Sypha Belnades, a magical scholar, thus fulfilling the prophecy of the "Sleeping Soldier." While Sypha believed Alucard to be good natured, Trevor was convinced that he was still Dracula's servant. With the hunter intent on killing him, Alucard had no choice but to fight Trevor, matching him blow for blow. During the battle, Trevor managed to land a hit on Alucard, slashing him across the chest with his Vampire Killer whip. Alucard retaliated by pinning Trevor on the ground, preparing to bite him.
Suddenly, he was stabbed by Trevor with a hidden dagger, the hunter intending to kill Alucard even at the cost of his own life. After seeing both Trevor and Sypha's resolve, Alucard stood down from harming Trevor and introduced himself, stating that he had been waiting for them to help him destroy Dracula. Convinced that the three of them could kill his father, Alucard set off with Trevor and Sypha on their journey.
The Battle Against Dracula
Reaching the Belmont Estate, the trio discovered the secret vault, which contained many mystical artifacts and volumes of arcane knowledge the family collected over the years. There in the vault, Sypha discovered a possible means to lock Dracula's castle in place, while Alucard informed the others about another find, that of a mirror that can be used to look upon faraway places.
As they prepared to locate Dracula's Castle, a horde of night creatures attacked. While Trevor held them off, Sypha completed the locking spell. Alucard used the mirror to locate Dracula's Castle, allowing Sypha to use her powers to transport the castle from Braila to above the Belmont Estate.
Alucard, Trevor, and Sypha together assaulted Dracula's Castle, wiping out his vampire army and generals before facing Dracula himself. Alucard's human allies were easily fended off by Dracula, forcing Alucard to take the fight to his father alone. They battled throughout the castle, smashing through walls and floors during their frenzied fighting. Eventually, the bloodshed reached Alucard's childhood room, where Dracula broke down as he realized he was fighting and trying to kill his own son, the last living link to Lisa that he had.
Overcome with grief, Dracula allowed his son to stake him through the heart. Alucard's allies arrived shortly after and beheaded Dracula and burned his remains, ending his threat for good.
The Aftermath
With Dracula dead, Alucard intended for Dracula's Castle to become his own tomb. Trevor however convinced him instead to become the guardian of Dracula and the Belmont family's combined knowledge and use it for the good of mankind. Alucard agreed and bid farewell to Trevor and Sypha as they headed off for another adventure. As he began to tidy the castle though, Alucard became overwhelmed by the grief he was feeling at losing both his father and his only two human friends.