Things You'll Need
Instructions
Connect each Xbox 360 to a separate television set using the included audio/video cables.
Connect the Xbox 360 consoles to each other with an Ethernet cable. The Ethernet cable plugs into the wired network connection input on the back of each console.
Turn on each Xbox 360 and both television sets. The "System Link" screen will appear on both television sets. Press the black button on each Xbox 360 controller to link the two consoles together.
Insert one copy of "Call of Duty: Modern Warfare 2" into each of the Xbox 360 consoles. Allow the game's main menu to load on each console.
Select "Multiplayer" from the main menu of each game. Select "Local" and "System Link." Select "Team Deathmatch" from the game type window. The consoles are now configured for system link play in "Call of Duty: Modern Warfare 2."