How long would it take you to beat all the CoD of duty?

Call of Duty: Modern Warfare 2's DMZ mode is astonishingly good, free - Polygon

Call of Duty: Black Ops - multiplayer details revealed, Games

How long is the Modern Warfare 2 Campaign? Main story length and mission list

Call of duty modern warfare 2: CoD player sets world record after completing every Modern Warfare 2 gun mastery - The Economic Times

MW3, Best Way To Level Up - Fastest XP Farm

Modern Warfare 3 campaign can be finished in 3-4 hours, it's claimed

Modern Warfare 3 campaign length - how long it takes to beat

Level up Modern Warfare 2 guns fast with 6 XP-boosting tips - The Washington Post

Do you still play previous old COD games on PlayStation 3 and Xbox 360? [COD] : r/CallOfDuty