They should only make a PC port. The xbox has problems running the game and, I would not want to see it on the GC or PS2. Sub 30fps for first person shoters sucks PC is the way to go for FPS.
The Xbox doesn't have any problems running the game and the framerate never dropped once when I played through it. But my biggest issue with the Xbox version is with the resolution. Some of the cinemas look pretty chunky.
