You are Alex Mercer, a shape shifter with absolute mastery over your genetic structure, stalking the streets of New York City, searching for your past. Delve into a web of lies and rip the truth from those who've hidden it from the public for forty years. Learn that you are not alone in your amazing abilities; that other killers stalk the city.
A secret war is brewing in New York. First, battle below the media radar, then, watch as a deadly infection spirals out of control and the government seizes the media to stop the spread of information. Finally, experience New York under quarantine as martial law is instated; igniting a firestorm of combat, carnage and death.
Face an ever growing army of infected creatures warped and changed by the virus. As it spreads, more and more of New York falls under its control. The virus overwrites a creature's existing genetics; warping and changing their form into something else, something planned. As the virus gathers its army, rush to discover the secret behind it all; the one thing that can stop it all before the city falls into ruin.
Against you is Project BLACKWATCH, an elite force of Army specialists ready to stop the spread of the virus at any cost. These operatives have seen it all before, and are eager to track you down and bring you in, dead or alive. Their mandate is complete containment; even if it means everyone in New York must die.
Struggle to define what you will be. Do you assist BLACKWATCH in its hunt, or join forces with the virus and subjugate humanity? Push your powers to the limit, and unlock the genetic shackles that hold you in check.