IMO mw2 was the worst in the series. Cod 4 does have hackers every once in awhile but those lobbies are easy enough to leave. Cod4 is so simplistic, that's what makes it great. You do not have to create intricate classes with equipment and other bs keeping in my things you have to counter. You can just slap on a gun some perks and play successfully for the most part. That is why this cod 4 is the best.