Focused, hard work is the real key to success.

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

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

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.

I wanted to remain a technical adviser for Id, but it just didn't work out. Probably for the best, as the divided focus was challenging.

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.

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