Prototype 2 may not be Activision's biggest-selling franchise by any stretch, nor is it necessarily the most original pitch likely to have sounded through their corporate boardrooms. A sandbox superhero game based in an apocalyptic New York, where the end-game is to thwart a government conspiracy determined to experiment on its citizens? Lovely - why not? The narrative set-up is structurally sound; a safe, sturdy foundation to build on for the writers, while the tech side sees big improvements courtesy of the new Titanium Engine 2.0. Judging by the quality of the end result, it appears to have been worth the effort.