There is no pro scan, it's one of the few GC games I have that don't support it Shame, the colours would have looked even more stunning, although the jaggies would have been more noticable so it's probably a good thing in a roundabout way.
If you really want progressive scan for Killer 7 you could fit a qoob chip to your GC, it can force most games into progressive scan, the best examples being Killer 7 and Beyond good and evil (this looks great in progressive)...
Comment