Type of file: ISO
Size: 612mb
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Installing:
Mount image using DAEMON Tools and follow install instructions. Or you can burn it to a disc. Find Product key below.
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Game runs extremely efficient, using Windows XP and on max graphics it is only using 40-120mb of RAM.
EDIT: This game does work online, installs the updates and everything but you can download the multiplayer one instead if that's all you want to do is play online.

Named Game of the Year by Electronic Gaming Monthly, IGN.com Edge, and the Academy of Interactive Arts and Sciences, "Halo" now makes its highly anticipated move to the PC, courtesy of Bungie and Gearbox Software. "Halo, " enhanced for play on the PC, contains all the action-packed combat and thrilling gameplay that made it a smash hit for video game fans everywhere. Armed with a new arsenal of weapons and vehicles, "Halo" delivers challenges and surprises as well as intense online multiplayer competition exclusively for the PC. Now you can take the battle online with all new multiplayer including new maps, weapons and vehicles available only on your PC!
Download1
http://www.megaupload.com/?d=FOX356J8
Or
http://rapidshare.com/files/94323739/HalPC_Spal.part1.rar
http://rapidshare.com/files/94339074/HalPC_Spal.part2.rar
http://rapidshare.com/files/94349435/HalPC_Spal.part3.rar
http://rapidshare.com/files/94361231/HalPC_Spal.part4.rar
http://rapidshare.com/files/94414574/HalPC_Spal.part5.rar
http://rapidshare.com/files/104154988/HalPC_Spal.part6.rar
Or
http://www.megaupload.com/?d=J955JQ4K
http://www.megaupload.com/?d=3D67HPKH
Product Key:
T39RX-JH7Y2-XWTJD-VJX8X-G7MD8

Multiplayer version:
Download
http://rapidshare.com/files/165480351/Halo_Multiplayer_Portable.rar
Or
http://www.mediafire.com/download.php?jmznz5nn5zd
Or
http://www.megaupload.com/?d=ZF6NKC5G

Read More......