What system can the Call of Duty System play on?

Question

Im getting a Xbox 360 Core System i wanna know real bad!

Answer 1

call of duty 1: xbox

call of duty 2: xbox and xbox 360

call of duty 3: xbox 360

call of duty 4:modern combat:xbox360

Answer 2

you can play call of duty 4 modern warfare on and xbox 360 core but if you want to save the game then you'll need a memory card of hard drive, i suggest a hard drive, its like twice as much as a memory card but like 200 times more memory