Most definitely "Call of Duty: Black Ops" - due to the number of people I have seen online playing it on the PlayStation Network. The most popular area of this game is the bonus Zombie level, which has 4 different sections for online, multiplayer games.
Call of duty modern warfare 3
Call of Duty classic Call of Duty 4 Modern Warfare Call of Duty World at War Call of Duty Modern Warfare 2 call of duty black ops call of duty modern warfare 3
call of duty 4:modern warfare call of duty: world at war call of duty: modern warfare 2 call of duty: black ops call of duty: modern warfare 3
modern warfare 2 trust me !
call of duty finest hour call of duty 2 call of duty 3 call of duty world at war call of duty black ops call of duty 4 modern warfare call of duty modern warfare 2 call of duty modern warfare 3
Call of Duty Call of Duty Big Red One 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 Call of Duty: Modern Warfare 3
Call Of Duty: Modern Warfare 3
You should buy either Call of Duty Black Ops, or Modern Warfare 1.
Call of Duty World at War, Modern Warfare, Modern Warfare 2, Black Ops, and Modern Warfare 3 all have online multiplayer.
Call of Duty 1, 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 Modern Warfare 3, Call of Duty Black Ops, Call of Duty Black Ops 2, Call of Duty Ghosts, Call of Duty Advanced Warfare coming soon on November 4th, 2014. Pre-order soon =D
Call of Duty 1. Call of Duty 2: Big Red One Call of Duty 3. Call of Duty 4: Modern Warfare Call of Duty 5: World at War Call of Duty 6: Modern warfare 2 Call of Duty 7: Black Ops Call of Duty 8: Modern warfare 3 Call of Duty 8: Black Ops 2
well call of duty and modern warfare are the same it is called Call of Duty: Modern warfare and then came call of duty: modern warfare 2