In the latest issue of Edge magazine, Call of Duty director Keith Arem discussed Modern Warfare, arguably one of the biggest games in the franchise's history.
"A TV Show will have about 400 lines of dialogue and a whole film will have 1,500-2,000 lines of dialogue. With a game like Modern Warfare we had about 42,000 lines of dialogue..."
This is approximately 21 times more than the amount of lines in a movie. Arem continued:
"Bringing in film an TV actors who aren't used to that amount of content and then sustaining those performances is a real challenge."