Yes it does, as long as you have an xbox live gold membership.
You play it using a controller as an input method. It is also possible to get Xbox live, where you can play with friends online.
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.
the only reason good reason you could is to play online. Or So You Can Chat To Friends That Have An Xbox 360 And Go On Thing That Are Online Like Facebook Or To Download Things?
Yes. But, you cannot play online.
xbox live play against friends and sky and memory and games to play
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
No you dont. Infact you dont need it with any, but if you would like to play online with friends, dowload extras for games,download films,unlock avatars and speek to your friends using your inbox or the Xbox 360 headset then yes.Hope this helps :)