Halo 2A Vista Physics

I was playing Halo 2A and the physics are pretty bad, like the windows vista Halo 2 version.
Is the Anniversary based of the original Xbox version or the Vista version.
I’m guessing Vista, as that already had support for high resolutions etc.
But some comformation would be nice.

Yeah you’re right, H2A is the PC port of Halo 2 with new graphics. One way to see this is on “The Great Journey.” When you get into a Banshee to cover Johnson, fly to the beach past where you start the level (natural progression). You’ll see a Wraith flip for no reason. This is a quirk from the PC version.