Sierra Entertainment today announced PROTOTYPE, a new kind of open-world game developed by Radical Entertainment, featuring a rich story line of conspiracy, deception and deadly shape shifting action.

PROTOTYPE 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 shape shifting powers allow him to become an exact replica and steal the skills or powers of anyone who crosses his path.

PROTOTYPE is set to debut on the PlayStation 3, Xbox 360, and PC in Summer 2008.

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