No you don't need to you can play with a tv remote
There is no HALO zero, I think you mean HALO 1. Yes you can play it with a game controller if you have it on X-BOX
an Xbox 360 (controller, cords, etc.) and a copy of halo... one that works.
Nope! You just need a keyboard and mouse.
They stoped online play for Halo 2 back in June 2010. And you need Xbox LIVE to play halo 3, however on the new Xbox 360 u can play halo3 online for free
No you don't.
Nope you can play all the halo series' campaigns online and off with out any downloads
You need to rechange your computer and put a plug like a PS and you can play online with conttroller
No set grade, play whenever.
I played the whole Halo: CE campaign with a PC USB Gamepad, just plug and play I don't think you need any drivers but in case you do just install the disc that came with the controller.
Xbox live yes
You Only need 256 MB.
no... only if you want to play online matchmaking