Yes it Does
Yes, Split-screen and Online Multiplayer.
Yes you can play multiplayer it is up to 4 players on split screen. To get to it go to multiplayer and click on split screen.
Yes
Unfortunately no, you can't play multiplayer on Call of Duty Modern Warfare 1 or on Call of Duty Modern Warfare 2 on the same screen. But on Call of Duty Modern Warfare 3 and Call of Duty Modern Warfare Black Ops you can play multiplayer on the same screen. There is an new Call of Duty Black Ops 2 coming out soon though, so I expect that to also have that feature, since its newer.
It does for the xbox 360 but not the normal xbox
you have to go on the option screen on the multiplayer menu
Depends on what you like, I favor Halo and Call of Duty.
Depends, which Call of Duty are you talking about.
Yeah it does in multiplayer, split screen mode and also in online matches
No, you can't play multiplayer in Call of Duty 3 Wii.
In Call of Duty: Black Ops, to go on multiplayer you have to go to multiplayer on the menu that says: CAMPAIGN MULTIPLAYER ZOMBIES OPTIONS
Call of Duty 4 is available on PS3, Xbox 360, and PC. It has split-screen multiplayer (up to 4 players) and online multiplayer (up to 18 players) as well as a single player campaign.