I saw the last poster and thought "Mason doesn't post here...", then I realized what must have happened
Woodstock, it's crucial to know
what budget you're looking at, and/or, what level of performance you want. You could probably make a machine for $400 that would physically run the game; it just wouldn't be very much fun to play with.
Here's the cheapest machine you could probably get away with to play the game smoothly:
Case:
http://www.newegg.co...N82E16811146061 $46
PSU:
http://www.newegg.co...Corsair%20CX430 :$27 after MiR ($47 without)
Motherboard:
http://www.newegg.co...N82E16813157277 $63
CPU/GPU:
http://www.newegg.co...N82E16819103942 $130
RAM:
http://www.newegg.co...N82E16820231552 $60 (APUs are the one thing that greatly benefit from fast RAM)65
Optical Drive:
http://www.newegg.co...N82E16827136236 $18
Hard drive:
http://www.newegg.co...N82E16822136591 $65
Windows 7 Home Premium:
http://www.newegg.co...N82E16832116986 $100
Total price with shipping: $509
If your budget is bigger, you can do better, but that's the cheapest way to go of that nets acceptable gaming performance that
I'm aware of.
EDIT: I see you're in the UK. Well IF you get the same prices over there, that build would be 320 pounds, probably plus VAT (Newegg doesn't charge tax in most states; US citizens just pay it back at the end of the year as "use tax", well, in theory they do

).
Less than that... not gonna happen unless someone has some odd idea I haven't considered.
Edit 2: With VAT, that comes to 380 it looks like.
Edited by Catamount, 04 April 2012 - 04:56 AM.