System:
1.6 GHz CPU or equivalent
RAM:
512 MB
Video Memory:
128 MB
I'm pretty sure my 1.9GHz dual core AMD Athlon X2 with 3GB RAM and onboard ATI HD3200 can run this.
I have an integrated GMA3100, I'm pretty sure even a low ranged thing it's better than mine. Bought it in the Steam sale and been liking it quite a bit.