Radical has sent over a developer diary for Prototype 2, and in it, the team discusses the reason why Alex Mercer is now the enemy instead of the hero, with a few clips of pre-alpha footage thrown in for good measure.
In Prototype 2, the team decided that since players had already spend so much time in the first game building Alex and his powers up, there just wasn't anywhere else you could take him. He had just become to powerful. In order to still include him in the sequel, they brainstormed and decided to make him the enemy instead.
"We decided to make him the enemy, but a really interesting enemy," said senior designer John Howard. "And then create a new protagonist so that right up front you have two interesting characters."
In the game, you will play as James Heller, a family man who has lost his family to the virus. Alex Mercer, who was responsible for unleashing this virus, infects James Heller, which causes a destructive chain of events, but also a vengeance plot cooked up by Heller; thus, the Murder Your Maker tagline.
"You end up hating him so much with this immense fire within you, but at the same time you are terrified, wondering if you have what it takes it beat this guy," said Matt Armstrong, the game's design director.
Radical basically compares the story to David vs Goliath vs Darth Vader, which makes your goal in the game "very clear - you are out there to murder your maker."
Prototype 2 is slated for release sometime in 2012 on PC, PS3, and Xbox 360.