Looking back, video game design seems a natural fit, although there was no such thing when I was growing up. I built a Tic-Tac-Toe playing machine in my teens which went up in smoke on the night it was scheduled to go to a science fair.

I was a little hesitant at taking the job at Atari. I had never programmed for a living and I worried it might get boring (building circuits seemed more fun). But I would probably still be in the video game business.

One week before Pitfall! was to be released, I only gave you one life to play the whole game. I was experimenting with that concept as sort of the ultimate challenge.

We were advised that nobody could stop us from pursuing our craft simply because we had honed, or even developed that craft while working at a company.

Even two of humanity's most intimate possessions - a sense of self and a body image - are fluid, highly modifiable creations of the brain's mischievous deployment of electricity and a handful of chemicals. They both can change or be changed on less than a second's notice.

Library of Souls' is longer than 'Hollow City' by a considerable margin, but this time I was on the right track from the beginning, so I never had to start over. It took about 15 months, all told.

Even in the most peaceful communities, an appetite for violence shows up in dreams, fantasies, sports, play, literature, movies and television. And, so long as we don't transform into angels, violence and the threat of violence - as in punishment and deterrence - is needed to rein in our worst instincts.

I believe that social change has almost reached critical mass. So many people have undergone personal transformation that their effect on society is having a geometric - not arithmetic - impact. This coalescence of energies brings about meeting, networking, and a sophistication in communications that is unprecedented in history.