You are Alex Mercer, the Prototype: a shapeshifter with amazing powers of combat, destruction, and deception. Consume targets for their form and memories to assume a perfect disguise, or instantly transform your body into an array of deadly biological weapons, cutting your way to the heart of the conspiracy forty years in the making. Stalk the streets of New York City, searching for the life you lead before. Take the form of anyone in your path, using an arsenal of identities to confound, exploit or annihilate your enemies. Mankind is your mask. Wage a secret war against factions with complex agendas of their own, out to capture or kill you. They are your greatest threat and the key to the secrets of your past.