Sources tell us that the upcoming Call of Duty 5 game in development is already playable, and currently going through quality assurance.

Treyarch is also said to be the developer, and the title, we' re told, is set in a WWII Pacific environment and will be using Call of Duty 4' s engine, the same engine on which the upcoming James Bond: Quantum of Solace movie game is being built.

Yesterday, on the company' s call to investors, Activision publishing CEO Mike Griffith said CoD5 would be coming to Xbox 360, PlayStation 3, PC and DS, in addition to a return for the franchise to PS2 and Wii for the first time in two years.