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switch 2 controllers on, sign one in, go on Halo 3 then on the one that is not signed in press a either choose a temporery profile like goose or choose a profile to sign in as from your xbox, play local and choose your lobby press start game and your there. its simple.

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12y ago
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Wiki User

15y ago

You can play Halo 3 Co-Op with either two people on the same console or up to four people over Xbox Live.

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Wiki User

14y ago

nope 2 per xbox 3/4 person xbox live or syster link only

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Wiki User

13y ago

You Can Play Up To 4 People Through Xbox:Live, But Offline, Just Two People.

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Wiki User

12y ago

go multiplayer then find co op have a friend with u or have a friend close by

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Wiki User

11y ago

Honestly, I don't think it is possible on one single xbox or gaming system, but you can to a two player co op with another Alie who is invited, I'm quite sure

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Wiki User

12y ago

You need Xbox live to play online.

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Wiki User

13y ago

Add another controller.

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Wiki User

13y ago

add another controller and sign in

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Q: How do you play co op mode on Halo 2 for PC?
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