Back in the day I used to play Doom 2 on my Quadra 610. It was a bit choppy unless I played it at the smaller screen size setting (this on an Apple 14" CRT with 640x480 max res to start with ). Even then it wasn't super smooth. But Fun! So yesterday I downloaded the Doom3 Demo for the hell of it. My G4 (see sig) is below the min specs and has a 133MHz bus speed to boot, but I figured I'd give it a shot anyhow. At 640x480 and Low Quality it looked fairly uninteresting, but the framerates stayed mostly in the 20's, maxing in the low thirties and dipping into the teens occasionally. The soundtrack is great, and at 2am it made me jump a couple times! In fact it ran about as well as Doom 2 did on my Quadra...which is good enough for me, though I won't buy it since I'm sort of getting out of gaming somewhat. Just though I'd share for the curious.