Simply, you can't. Halo Zero has to be downloaded. So far nobody has found a way to put it online (I think, but there may be some other better answers).
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
there is no halo zero 2 there's halo zero halo PC (1) halo for vista (2) and halo 3
with a 360 NO. but you can play halo 2 on PC for free
Halo Zero cannot be played online. It must be downloaded from its website and installed. It does not support online play in the campaign, being a sidescrolling shooter game, but it does have several multiplayer maps.
halo is only on xbox 360
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
You can play halo games online at addictinggames.com, where they have a wide variety of free games, and many of them are similar to halo. I think you would enjoy playing on that website.
yes
Yes
No there are not any halo games available to play online. All halo games are in disk form, available on ps2, Xbox, xbox360. Sorry this was no help to you.
on an xbox press multiplayer
you play online