An interesting question: is it easier to motivate a learned individual that never does anything, or educate an ignorant individual that actually produces things?

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.

One of the big lessons of a big project is you don't want people that aren't really programmers programming, you'll suffer for it!

Programming is not a zero-sum game. Teaching something to a fellow programmer doesn't take it away from you. I'm happy to share what I can, because I'm in it for the love of programming.

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.

You can prematurely optimize maintainability, flexibility, security, and robustness just like you can performance.

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.