Offline - Yes, just make sure you have that many computers connected on LAN or that many controllers connected to your system. Online - Absolutely, on all platforms.
I would suggest COD 4 (Call Of Duty 4) or Halo 3 but my favourite is Call Of Duty 4.
The Call of Duty 4 campaign is strictly single player.
no
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.
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In Call of Duty 4 there are no multiplayer options for story mode, although Call of Duty: World at War does have this feature.
there are 4 ps2 Call of Duty's. These are Call of Duty 1, 2, 3 and World at War
no there is not a CoD 3 on ds. but there is call of duty 4 MW, CoD modern warfare 2, call o duty WAW, and a new call of duty on ds: call of duty black ops.
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.
it has a different story Call of Duty 3 was made by Treyarch who has also made World at War and Black Ops COD 4 is by Infinity Ward who do the Modern Warfare Series of Call of Duty
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)
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