As the PS3 successor of Vampire Rain on the Xbox 360, Vampire Rain: Altered Species is an intense game that takes place during a dreary night in a suburban, west coast city in the US. For some time now, mankind has been battling the ferocious and terrifying Nightwalkers, a race of superhuman vampires who crave human blood. Gamers take the role of John Lloyd, a member of a US special government unit created to defeat the Nightwalkers, and the only human to ever survive a physical encounter with them.