I must say this is some interesting stuff. I have never actually played it, but I remember it was a major hit, with awesome graphics. I also wonder when they will release the new Unreal Tournament.
Yeah, Halo 1 and 2 already had PC ports, and I know the Halo 3 engine was made to run on PC especially since they ported that online game for Russia with the same engine. Moreover, over the years there were a lot of leaks of running PC builds of Halo 3. It was going to come on PC one day or another, I'm glad it's coming sooner rather than later.