Online gaming is the center of the industry and a must have component for most games to really be successful. The fact that M.A.G. is a brand new IP while Call Of Duty is a well respected franchise it's easy to say that the multi-player will be in favor of Modern Warfare 2. According to what we know the brand name of Call Of Duty may be the only thing that will put it over the top of M.A.G. but looking at what each game has to offer, Call Of Duty may very well lose the multi-player battle in this competition.