Yes
No, there is no way to play Xbox 360 games on a original Xbox console.
No, because it's an Xbox 360 game. You can't play Xbox 360 games on the original Xbox console.
Yes, you can play Halo 2 on the Xbox 360, but it requires the original Xbox version of the game and is not available as a standalone title on the Xbox 360 Marketplace. The game is backward compatible, so if you have the original disc, you can insert it into the Xbox 360 to play. However, online multiplayer features are no longer supported.
As far as I know, you can play all original XBOX games on the XBOX 360. It may be different for some of the first XBOX games but both Halo and Halo 2 are playable on the XBOX 360.
Yes you can play most original Xbox games on a 360.
You have Fable 1 GTA SA Halo 1
No, you do not need Xbox LIVE to play any original Xbox games. Not all original Xbox games can be played, but Halo and Halo 2 do not need LIVE to be played on the Xbox 360. I just now tried it with my LIVE unplugged and signed in to an offline account and it let me play both of them. The previous answer was a lie, obviously.
No. You can play Halo Reach on the old Xbox 360 consols.
No it will only work on Xbox 360. Halo 1 and 2 will work on the original Xbox.
Halo 2 was made for the original xbox, unless there was a console before the "xbox" that I didn't know of. It looks cool on the 360 though and Halo 3 looks even beter.
Halo 1: Xbox, Xbox 360, & PC Halo 2: Xbox 360, & Windows Vista Halo 3: Xbox 360
Yes, If you have the Halo Ce disk for xbox (It's 360 compatible) and the halo 2 disk (also compatible)..don't expect halo 2 to have online play via xbox live anymore though. They shut down all original xbox game severs down a while back.