Cod 1 intro: "In the War that changed the world victory was not achieved by one man, but by the lives of many." You were a nobody grunt fighting with nobody grunts with a few memorable comrades. You had a health bar and the challenge was to stay alive and to remember to save. Heck it said no man fights alone on the box.
Modern Warfare 1-3: "Blah blah terrorists." Run around with Captain Price fighting a one man war and save the day three times singled handedly while people like Frost, Ramirez, and Jackson were thrown to the sidelines as unimportant characters. Plus there was no challenge to the campaign other than to shoot your way through and take cover if your screen gets bloody.
