Final Gate
 

I have the PC version and I know much is different than the X-Box version.

Qustion? Do you kill Mendoza before placing the 4th skull on the pedestal? Because if you place the 4th skull first, Mendosa runs off through the gate and closes it, but first uses a telekenisis spell to grab the 4th skull.

Any help would be greatly appreciated for the PC version.

That's exactly what's supposed to happen. You don't fight Mendoza until later…

I didn't think there were major content differences between platforms?

I heard the major difference is that the PC version rocks while the XBox conversion sucks. ;)