After waiting for a few years, Halo 2 is FINALLY coming to PC. This is the cheapest I could find preordering Halo 2 (PC).
Only for Windows Vista, "Halo 2" will offer gamers both the single-player campaign and multiplayer experience of the original, as well as the additional maps offered in the "Halo 2 Multiplayer Map Pack." Gamers will also have the exciting opportunity to build, create and customize their own multiplayer levels.
Note: This game will require Windows Vista in order to play (dumb i know!), hope there will be a fix for this though.
It will be released on 18th May 2007.