They didn't do system link co-op on either Halo CE or Halo 2.
"slug" <firstname.lastname@example.org> wrote in message
> Does anyone know if it is possible to play a 2 player campaign using 2
> systems on halo or halo 2.
> If possible please explain.
> I would really appreciate it.
"FishBone" <email@example.com> wrote in message
>I don't think you can link up and play Halo one with the coop campaign... I
> think I tried that once... As for Halo 2, well, you can play it over live
> so I don't see why not