I wouldn't REALLY call it multiplayer since it's only 2 vs 2... the multiplayer is pretty much a co op 2 vs 2 type deal where you have objectives you have to complete and compete to finish with the other 2 man team. You win by earning the most money. There's also computer AI running around shooting at both teams.
Sad thing is, the multiplayer is pretty shitty outside of the actual gameplay... There's no "partying up" type thing like in CoD4, and no map rotation either, so once you're games over you're pulled back to the main menus. Also out of playing the game all day today and yesterday I've only been able to successfully complete 6 ranked games.. All others dropped connection or there was constant lag of a "Waiting for other player" coming up on my screen.
I heard there's going to be a patch for it next week... hopefully it will fix it all.
