Yes, you can.
no halo 3 odst is basically what happened before halo 3 and of course it will have a campaign like any other game so it will not be live only
If you mean the Multiplayer disk that came with ODST then yes, but if you mean the ODST campaign disk then no.
You can't
yes
Yes, you can play firefight in Halo 3 ODST without Xbox live.
You need to preorder Halo 3 ODST and have the code on XBOX Live to get Sgt. Johnson
you get the multiplayer beta with odst but not the whole game it the beta comes out may 3rd 2010 halo 3 odst included also xbox live gold
Halo 3: ODST will only be released on the Xbox 360. The are currently no plans to make Halo 3 or Halo 3: ODST available on any other console other than Xbox 360.
Yes, there will be Forge mode in Halo 3: ODST... but on the other hand there is two discs so there might not be in the halo ODST disc.:)
personally i like halo 3 better then all of halos so far. halo 3 is better because you are able to play agenset people on xbox live but halo odst is better in the sence that the story line makes more sence then all other halos.
It's the same as halo 3 (:
No. Halo ODST is a special variant of Halo Wars that contains 5 new unit types that will help you beat the game faster. Additionally, ODST is able to play online via Xbox Live with Halo Wars, so you can trounce people online using the new ODST units.