I got this info from looking around at Distrowatch and it looks cool... its name is Morphix and it has boot cd's that are very Knoppix-like in that they have every application known to man fit on the cd and then they have a lite version that runs on older hardware and "flies on newer hardware"... but more importantly they have a games specific version. Apparently they have just released new versions of these isos.
Here is their page