You need an ethernet cable (or wireless adapter) and xbox live gold edition
On the Xbox 360
You can play any online game without Xbox live.
The xbox 360 is made for to play with other people online
Yes, there are many people who play FEAR 3 online on Xbox 360.
If you mean, can you play a copied Xbox game on your Xbox 360. The answer is yes, but you will need to mod (chip) your xbox.
Yes. But, you cannot play online.
Yes, you can play Halo 2 online on the Xbox 360 using Xbox Live.
You do to play online on the Xbox 360 only. Other systems also have online games
Yup u can and i tried it and it worked on the xbox 360
if it can play on the Xbox 360 then it should be able to go online
On your Xbox 360 console.
on xbox 360 you can go on xbox live.