Prototype, the action game developed by Radical Entertainment for PC, X360 and PS3, has shipped to retail stores, Activision announced. Prototype is am open-world game which tells the story of Alex Mercer, a man haunted by his past, fighting a secret war in New York City. As the action spirals out of control, a conspiracy tied to his origins threatens the future of mankind itself. Mercer's amazing shapeshifting powers allow him to become an exact replica and steal the skills or powers of anyone who crosses his path. Prototype will be available in the UK on June 12.