If you are playing on PlayStation or Xbox, accessing local offline matches without an active internet connection is entirely possible. Call of Duty® Store | Modern Warfare III
You can play locally with a friend on the same console by connecting a second controller. Note that both players usually need a registered account on the console, as "guest" accounts may not be supported. Call of Duty: Modern Warfare 3 (2011) call of duty modern warfare 3 lan multiplayer offline
If you are playing on PlayStation or Xbox, accessing local offline matches without an active internet connection is entirely possible. Call of Duty® Store | Modern Warfare III
You can play locally with a friend on the same console by connecting a second controller. Note that both players usually need a registered account on the console, as "guest" accounts may not be supported. Call of Duty: Modern Warfare 3 (2011)