Xbox Live on PC.

[lancec2c30]

No, halo 2 does not support Live anywhere cross platforming. You can go up against other pc players, but not people on a 360. Shadow Run will be the first game to support this like mentioned above.

 

[Giles]

No, halo 2 does not support Live anywhere cross platforming. You can go up against other pc players, but not people on a 360. Shadow Run will be the first game to support this like mentioned above.

I think you might be wrong, check out this.