I've played a lot of multiplayer games and this one is by far the best. The playing field seems to be leveled a lot on this game. No bunny hopping around like some sort of retarded kangaroo like people do on that piece of crap Halo 3. there are many unlockables in the multi player such as weapons and "perks." These perks add everything from increased damage infliction to eavedropping on your opponents chatter. The campaign is fairly difficult, but could be a little longer. My only complaint about this game is the lack of co-op campaign. Try this game, you'll be hooked!