I've heard of other people playing Combat Arms on an Imac using parallels, so I bought it. Now, when I try to play the game, everything works fine until a battle starts, in which everything goes black. Weird part is, I can still hear the music, move around and shoot in the game.
What's going on and how do I fix it?

Incomplete hardware support (graphics set) in virtual machine. You cannot use a VM for playing with high-powered games.

Fix it like this...
-- Open Boot Camp Assistant.
-- Create a Windows partition.
-- Insert the Windows DVD.
-- Click "Install".