Focus is a matter of deciding what things you're not going to do.

The situation is so much better for programmers today - a cheap used PC, a linux CD, and an internet account, and you have all the tools necessary to work your way to any level of programming skill you want to shoot for.

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.

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.

The Xbox 360 is the first console that I've ever worked with that actually has development tools that are better for games than what we've had on PC.

The cost of adding a feature isn't just the time it takes to code it. The cost also includes the addition of an obstacle to future expansion. ... The trick is to pick the features that don't fight each other.

Focused, hard work is the real key to success.