without the knowledge of the Prepper, who believes that a cure is impossible. After leaving the palace the player is led by Sondra to the remnants of the Ravens of Dee and tries to escape with the player in a helicopter on the Tower of London. A supernatural force drives a flock of ravens into the propeller, making the helicopter crash. The player returns to the Prepper's bunker, and Sondra promises to save them. In the bunker, the generator is running out of fuel and the Prepper tells the player to get petrol from a man named Vikram. The player finds Vikram, who has gone mad; he and his young child tell the player to go to a local nursery to get antibiotics for his wife. Despite the Prepper's protests (who thinks the player should raid the petrol station), he goes to the nursery; the staff and children have been eaten by a nurse, who became a ghost-like monster capable of teleportation. The player returns with the antibiotics only to find that Vikram has become infected and eaten his family, though he begs the player to kill him before succumbing to the virus, with the player granting his request. On the way back to the bunker with the petrol, the player receives a distress signal from a young girl that she and her family are barricaded in St. George's Church. Although the Prepper correctly insists it is a trap, the player goes to rescue her. The player is kidnapped by Boris (the self-proclaimed King of Zombies) and his gang, who force survivors to fight off waves of zombies in the church's courtyard. Boris' lights, microphone, and music attract a horde of zombies, and he and his gang are eaten whilst the player escapes. The player has enough upgrades to collect Dee's remaining letters for Dr. Knight, who believes that he can now make a panacea. The player returns to the safe house, where Knight reveals that the panacea is not a cure but a vaccine. The Prepper expresses profound disappointment in the player as he returns to Buckingham Palace. Knight has left his bunker for the queen's quarters to access data on a USB key. The player goes through the palace, only to discover that Knight has been turned into a zombie, forcing the player to kill him. The player uses Knight's eye to bypass a retinal scanner and collect