At the main menu, you go to multiplayer and then select split screen. hope this helped you!
Yes.
The Call of Duty 4 campaign is strictly single player.
No but Call of duty World at war has 2 player co-op on the campaign but black ops has 4 player zombies (4, 3, 2, 1 online and 2 or 1 offline)
Modern warfare 2 is not Call of Duty 4
No But you can play 2-player online, and 2-4 players for Nazis zombies.
Call of Duty Reflex Edition includes all the features of both the single and multi-player modes of Call of Duty 4, except for the fact that there is no squad-mate mode on Call of Duty 4.
i say call of duty
You are asking about 2 different games call of duty 4 modern warfare and call of duty world at war
Call Of Duty 4 all the way
well 4 has better graphics and you should buy that
In Call of Duty 4 there are no multiplayer options for story mode, although Call of Duty: World at War does have this feature.
the only cheats that you can unlock in call of duty 4 are the ones from collecting Intel in the single player campaign. Other than that there are no other cheats for call of duty 4.