Mine was cod3 but I never played it online, My first online cod was cod4 in 2007 and I remember playing it in a store and they just had it set up on an xbox like weeks before release and I was like this is pretty good. Got it on release and played campaign without even relizing the multiplayer was any good, didn't try multiplayer for months, then of course I got hooked on that and I still play cod4 on pc to this day. Love that game, multiplayer will always be the best in that game for me