Call of Duty multiplayer

A simple question that I can’t seem to find online. Not counting the PS Network, just boys sitting in my living room Saturday night, how many people can play CoD Modern Warfare 3 or Black Ops simultaneously?

Four on one system in split-screen mode. But you’d better have a big TV, because each player only gets a quarter of the screen.

4 player can playing this game but 2 player are more better play rather then 4.
I always play with two player.

Please stop playing and purchasing this game for the sake of the future of gaming.