Well i was on gameinformer site and some kid who said he got the new issue of Gi magazine with the 10 page story of Halo 2 said this
" mmm i got mine but I forget the material and I'm too lazy to get the magazine down. All I know is that they said they held Beta Tests already online and people say it's amazing.
i dont no if this is true or not
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For 1000 Microsoft employees only, and it is already over with. There will not be a public beta test or demo.