Microsoft Responds To ( Increased Price ) For Halo 3: ODST

[wfz]

Is it 4-player co-op from the same console, or only 2 co-op but up to 4 co-op online?

And does anyone have a finalized idea of how long the campaign will be?

I no longer have high speed internet so I won't be able to play online. Local multiplayer and single player co-op is basically all I want out of this game.