Amazon.com ($27.99),GameStop ($29.99)
Amazon.com is better but if you like to buy direct and not to wait then go to gamestop.
No, it has not released yet for the PC, only Halo 1 and 2 are for the computer as of 2009.
You can mod halo 2 on the computer by enabling some mods downloaded from halomaps.org, or you can make your own using those tools.
Halo 2 for the computer is only One-Player. Two people cannot share one mouse.
The bigger Halo titles have always stayed on the Xbox. It seems after Halo 2, they have stopped making Halo for PC.
It will be released on May 29th 2007... -.-
Halo 2 was designed and released as a 'Game for Windows' and only works on Windows Vista. It is said, however, that there are ways to get it to work on XP. Emulation is another possibility to use the xbox version of Halo 2 on any computer.
$4.99
you can download halo 1 demo but usually hard to find cannot rerally download halo 2 or 3
My two favorite one: 1) Halo 2 "Holographic Glitch": http://videotutorialspot.info/2007/07/computer-video-games/halo-2-tricks-glitches-burial-mounds-hologram-glitch/ 2) Halo 2 "Superbouncing": Google it you can find a bunch of tutorials
Yes its for windows vista and its the only halo 2 game with a working multiplayer(x-box version got shut down by Bungie).
£20 highest?
Theres halo 1, halo 2, and halo 3 There probably wont be anymore halos because bungie and Microsoft split up