Yes sadly you really do need Vista to be able to play Halo 2. There are a few cracks out there that sort of make it work on XP but so far there's been no real or legit way to fully play Halo 2 on XP. Sorry
Yes. However, you must make sure that the version of Halo 2 you are trying to play is the PC edition rather than the XBOX version. It should read "Halo 2 for Vista" or something similar. Now this does NOT mean it is only compatible with Vista. Halo 2 is compatible with Windows Vista and Windows 7, but not Windows XP.
Yes i have not used vista for gaming but instead i use windows and halo runs just fine.
Yes. Halo 2 runs on everything from Windows Vista and newer (which would include Windows 7).
No, it's compatible with Windows XP, or Vista/Vista64.
Halo 1: Xbox, Xbox 360, & PC Halo 2: Xbox 360, & Windows Vista Halo 3: Xbox 360
DirectX 9 is included with Windows Vista.
I have a Windows Vista OS and a Windows 7 OS and I don't need one to play. I'm not so sure about other opperating systems below Vista.
You can use any Vista's
No, Halo 3 is only avalible on Xbox 360.
there is no halo zero 2 there's halo zero halo PC (1) halo for vista (2) and halo 3
Yes, all Games for Windows - LIVE games have constant servers running, and quite a few people such as myself (Gamertag - Petera275) still play.
Yes.