Halo 2 from Bungie and Microsoft Game Studios will be released on 08/05/2007 exclusively on Windows Vista - over a year after it was announced for PC, and two and a half years after it was released on XBOX. UK Gamers: Amazon UK has a pre-order date of 30/05/2007.
The highly anticipated title brings Master Chief to Windows Vista and is the first title to incorporate the new Games for Windows — LIVE service. Windows Vista gamers will be able to challenge each other in PC-to-PC multiplayer matches and earn achievements for the first time in the "Halo" franchise, as well as communicate via voice or text with other Xbox LIVE or Games for Windows — LIVE members. The visually enhanced classic includes an all-new Map Editor, which will allow for new content and greater game customization. "Halo 2" will be playable with mouse and keyboard or the Xbox 360 Controller for Windows.
News source: Bink