I think the reason that I like so many different games is because I like the way my brain works when I'm playing games. It's more fun.

I think DOOM had just the right mix of elements that keep people coming back to it: great monsters, excellent weapons with great balance, a spooky environment and extreme speed.

The analogy I use is that 'World of Warcraft' is like going to the mall: you see a ton of people there, but you don't really want to interact with them; you just want to know you're part of the human race. And if you get in trouble, you'll know someone else is there.

It may be a lot more personally rewarding to focus on the marvelous new equipment, but the focus should be on customers - attracting them, courting them, rewarding them, understanding them and binding them to you.

Doom 2 is just such a bigger, badder, better version of Doom

I'm creating the kind of games that I like right now. I'm not being held back by technology.

What I didn't foresee in 2005 was the rise of the post-PC, which are all these tablets now. These are the things that actually will probably be the end of the consoles.