PowerVR chip in the DC was indeed powerful, and the Kyro/Kyro II for the PC are even more powerful. IN all honesty, I loved the Kyro II, tile based rendering is still a VERY good thing. As it only renders polygons which you see on the screen, instead of every polygon at one time.
Dreamcast games in it's later life were just as good as todays games on PS2 and Gamecube are.
Soul Calibur Year: 1999


Headhunter Year: 2001
