Yes, you can play cooperatively with a buddy over Xbox live, or on the same Xbox.
Sadly... no. You can play Special Ops multiplayer, Xbox Live and split screen. And you can play Xbox Live, Xbox Live but not split screen
Yes, you can play Halo 2 online on the Xbox 360 using Xbox Live.
Well it depends on what games. Most games u can play xbox live with 2 people. For example on halo 3 u can play 4 people on xbox live...
No You Cannot Use 2 Xbox Live accounts of 1 CODMW2sorry
you can play on games wiv ur xbox live freinds :) and speak 2 ur m8s
You do not need Live to play horde.
No they are two different platforms. A PC gamer will not be able to play with an xbox user and vice versa.
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.
You can't.
No but you can do splitscreen.
As long as both players have Xbox Live Gold you can play 2 seperate accounts on the same console on Zombies and Multiplayer.