Gaming on Mac Mini?

Hi,
I have recently sold my XBox 360, and want to use my mac mini to play games, such as far cry (2) or pro evolution soccer etc. (im just a casual gamer)

I'm slightly concerned though, because I know the mini uses integrated graphics which aren't great, so I was wondering what you think please? I use OS X, but I have a Vista partition (try to avoid, because i love os x) which will probably be the one used for the games, because there's more choice for me.

I will include specs below,
Thanks very much for your time,
John

Manufacturer Apple Inc.
Model Macmini2,1
Total amount of system memory 1.97 GB RAM
System type 32-bit operating system
Number of processor cores 2
64-bit capable Yes

Display adapter type Mobile Intel(R) 945 Express Chipset Family
Total available graphics memory 256 MB
Dedicated graphics memory 0 MB
Dedicated system memory 64 MB
Shared system memory 192 MB
Display adapter driver version 7.14.10.1437
Primary monitor resolution 1680x1050
DirectX version DirectX 9.0 or better

Well, you can give it a go... it's not gonna compare to your old 360 though!

Minimum Pro Evo requirements. The recommended ones are a LOT higher. It also mentions a demo - you could give that a go and see how it runs before buying it.