Yes. Currently it's selling for $19.99.
You can buy a membership in the marketplace.
Xbox live Marketplace you have to be a member of xbox live though i would not get it it is boring.
No but you can buy them on xbox live marketplace
You don't You purchase any of the 4 different map packs from the Xbox marketplace
Yes,Call of Duty 1 and Call of Duty 2 are both World War 2 Based and were released for the original Xbox.
There are currently no multiplayer maps available for Call of Duty 6 or Call of Duty: Modern Warfare 2. When they come out, they will be on the Xbox Live marketplace, The PlayStation Store, or on the Internet.
yes
Call of duty 4 Call of duty world at war Halo 2
You need an online connection and an account for the Playstation Store or Xbox marketplace
They are Call of Duty World at War and Call of Duty Black Ops for the PS3 and Xbox 360. You can not get them on Call of Duty World at War Final Fronts for the PS2 and you also can not get them for the Call of Duty World at War versions that do not have Zombie Map Packs.
2 Call of Duty titles have been released for the original Xbox. They are Call of Duty: Finest Hour and Call of Duty 2: Big Red One.8 Call of Duty titles have been released for the Xbox 360. They are Call of Duty Classic, Call of Duty 2, Call of Duty 3, Call of Duty 4: Modern Warfare, Call of Duty: World at War, Call of Duty: Modern Warfare 2, Call of Duty: Black Ops and Call of Duty: Modern Warfare 3.(This information is as of 18 September 2012)
In call of duty, world at war, hold square for ps3 and i think its x for xbox. same as how you get in.