Sierra and Radical Entertainment announced today that Prototype has been pushed back to 2009. The game was originally set to release in Summer 2008 for PC, PS3 and Xbox 360. Prototype is billed as an open-world superhero game, with the shape-shifting protagonist facing off against secret government forces and infected mutants.

"Sierra Entertainment and Radical Entertainment have made the decision to shift Prototype to launch in 2009," said a company representative. "Since its announcement, Prototype has been regarded by many as groundbreaking and taking the open-world genre in new directions, and in the simplest explanation possible, we need more time to deliver the game the team initially set out to create."

Thanks to IGN for the tip.