Focused, hard work is the real key to success. Keep your eyes on the goal, and just keep taking the next step towards completing it. If you aren't sure which way to do something, do it both ways and see which works better.

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

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

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.

I like to think I'm pretty good at what I do.

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

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