Nephew and I tried a system link today with his and my son's consoles. We were able to select the System Link option from the Settings and Files menu and go to the Custom Games for the acutal game. Guess what: nephew's console is nowhere on on the screen. Niether does his GT appear in any list anywhere. Thinking something maybe wrong with the cord (we are not connecting thru a hub or router...I say that because I had a Gamestop employee try to tell me that System Link could not be played with just an ethernet cord connected into two consoles) we pulled and cleaned out two copies each of Halos 1-3, Reach and ODST. And we promptly played one systme link game apiece with no problems.
Insert Halo 4 and nothing...where are we going wrong?