Answer
If you are asking if the X-box 360 version can be played on the Original X-box then no.
Yes,Call of Duty 1 and Call of Duty 2 are both World War 2 Based and were released for the original Xbox.
AnswerCall of Duty 3, Call of Duty: Finest Hour, and Call of Duty 2: Big Red One.
sure
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)
The games are available and are very inexpensive when compared with the Xbox 360 games
yes
It would depend. If you are referring to Xbox 360, then yes. However, Original Xbox is metaphorically extinct, so that would be a no.
Yes. I have played Call of Duty games online with a wireless connection with PS3, Wii, and Xbox 360.
Call of duty 2
Halo 3, Call of Duty 4, Call of Duty World at War, These are the most played games on XBL.
it depends where you get it
There is a Call of Duty for PS3 and Xbox 360.