the upcoming months, including support for THX's neutral 7.1 surround sound, being the first video game to support it, and the reveal of the voice cast in February. On April 8, 2008, Sierra announced the opening of the game's official website . On May 5, 2008, Sierra and Radical announced that the game would be pushed back to 2009. On July 28, 2008, after the merger of Activision and Vivendi Games to form Activision Blizzard, the company announced that they would only publish five Sierra titles, with Prototype being one of the five titles retained alongside fellow Radical Entertainment title Crash: Mind Over Mutant. On August 14, 2008, Radical laid off some of their staff, which led to a fear that the game would be delayed again. A Wii version was rumored to be in development but was never released. On April 8, 2009, Activision announced they would release the game on June 5 in Europe, and on June 9 in North America. However, the game's European release was later delayed to June 12. Comic book On April 15, 2008, Sierra announced that a six-issue comic book miniseries would be released by DC Comics under their Wildstorm imprint. The comic book miniseries functions as a prequel to the game, revealing more details about the Blacklight outbreak and characters such as Elizabeth Greene. Reception The game received "generally favorable reviews" on all platforms according to the review aggregation website Metacritic. Prototype was released on Steam as well as in retail stores and topped the Steam sales on the week of its release. The Xbox 360 version of Prototype was the top selling game of June 2009 in North America, with over 419,900 units sold. This made the game a Platinum Hit. As of March 2012, the game had sold 2.1 million copies worldwide. GameSpot praised the game for its "intriguing storyline and protagonist" and "massive arsenal of moves and abilities", but criticized it for its "occasionally fiddly controls" and "dull scenery". The Escapist said the Xbox 360 version was a perfect "summer fling," praising the combat and movement systems as well as the unique mechanic of the Web of Intrigue. The A.V. Club gave the same console version an "A−" ranking, calling the movement style "exhilarating" and saying it was a "mature, science-fiction superhero fantasy that somehow makes players feel simultaneously powerful and vulnerable." 411Mania gave it a score of eight