So far I've had only one report of the game flat out not running on someone's machine.
If you have one of those graphics card that is almost not a graphics card you may be in trouble. Any card made by either AMD or nvidia made in the last 8 years is probably ok? I haven't tested it extensively.
Tell you what, I will send you (but nobody else) a free copy of the game if you tell me what performance is like on your terrible $200 computer! :) Shoot me a quick email at erik (at) doborog .dot. com