this seems strange to me..... because games rely much more on the graphics card than the actual CPU. I'd like to see if it will install on a non dual core CPU, I have a feeling it would, and if you had a good enough video card, you would be all set.
but on a side note... come on. if you do PC gaming at all, you have to know that you NEED to keep up with the hardware (which is why I switched to console gaming for the most part) Dual cores have been out for 2-3 years now, so if you playing games on a 2-3 year old PC, its probably time to upgrade anyway.