How a play co-op offline in my xbox360 halo3game
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You can log up to 4 in so you just go to campaign and press A on all controllers except the 1st controller because that will all ready be logged in and Just start campaign
Happy Cheating! '')
Make sure you have two controllers hooked up, then go to campaign. :]
Press the big 'x' then the player 2 person will press the blue 'x' and pick guest.
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