Heller is an engaging character, with some excellent and often funny speech throughout the game. don't forget that Prototype 2 is a game with an 18 rating for a reason! Your available options increase as you progress, for example, turning a soldier into a biological bomb. Infiltration of enemy compounds is also enjoyable, as you try to consume and take on the appearance of different people out of view of others. As the challenge increases, you'll need better tactics and more variety to overcome the enemies and bosses you'll meet. Heller's powers are what make Prototype 2 so much fun - leaping, climbing and flying around the city is excellent, and the combat is varied and never gets boring. By consuming other people, Sgt James Heller can assume their identities and read their memories. You'll do missions in all of these areas, on your way to confront Alex Mercer. There's green, which should be safe, yellow, which is poor and full of shanty towns, where the virus can be found, and red, where the virus is rampant. Prototype 2's New York Zero is split into areas, depending on the level of viral infection.