User blog comment:Ausir/It takes 500 people to make Call of Duty/@comment-27.32.40.200-20110909092836/@comment-1055346-20110909183037

You want them to completley build an engine from scratch? YOu know thats a difficult task right? Thats why they use the COD 2 engine as a base and increase the graphics, features, and physics with each release. And its not outdated. an example of an outdated engine would be the Unreal Engine 2, Duke Nukems engine