It is difficult to make good scalable use of a CPU like you can of a graphics card. You certainly don't want 'better or worse' physics or AI in your game

If you're willing to restrict the flexibility of your approach, you can almost always do something better

I'd rather have a search engine or a compiler on a deserted island than a game.

Some cynical people think that every activity must revolve around the mighty dollar, and that anyone saying otherwise is just attempting to delude the public. I will probably never be able to convice them that that isn't always the case, but I do have the satisfaction of knowing that I live in a less dingy world than they do.

It's a good thing Doom 3 is selling very well.

It's nice to have a game that sells a million copies.

I really think, if anything, there is more evidence to show that the violent games reduce aggression and violence. There have actually been some studies about that, that it's cathartic. If you go to QuakeCon and you walk by and you see the people there [and compare that to] a random cross section of a college campus, you're probably going to find a more peaceful crowd of people at the gaming convention. I think it’s at worst neutral and potentially positive.