That means your game is scratched or your xbox can't read it.
you do apparently have an illegal version of Halo. get the legal version of halo to play the campaign.
If youhave the "Halo 3 Mythic" it does not let you play campaign but if you have "halo 3" your disc is broken but on halo 3 mythic campaign isn't on that disc. Add me on xbox live im Mr quiggels
you need to have gold membership.silver members arent allowed to play live
Make sure your Family Settings allow you to play Xbox Games on live.
Yes, but some games, like Halo 3 will not let you play co-op campaign through xbox live and will not let you use theater.
In my opinion, Halo 3, because the storyline is better (partially because it continuing the story from 1 and 2). Halo Reach's campaign is still good, but should've been a bit longer. Anyway, don't let me decide for you, make your own decision :)
well you defiantly can play solo on Halo 3...in fact that's all i played
Either their is something wrong with your internat or your halo custom edition is stuffed because it does let you play maybe you need to reinstall halo custom edition.
Halo3 should let you play big team if you have all the download able content.You should make you you have all the downloaded content, and that it is all downloaded properly, and it should work.
Let you play the multiplayer Beta of Halo Reach. If anyone could add a bit more then thanks
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