The engine has been distinct from the id Tech 3 engine on which it is based since "Call of Duty 2" in 2005. The engine's name was not publicized until IGN was told at the E3 2009 by the studio that "" would run on the "IW 4.0 engine". Development of the engine and the "Call of Duty" games has resulted in inclusion of advanced graphical features while maintaining an average of 60 frames per second on the consoles and PC.