I like that I make toys.

When I play games, I'll make up little stories for just anything. It's almost the game of making up background stories for people you see on the street. You know what I mean? I wasn't exactly the popular kid in school growing up, so I found myself really observing people, and watching how they interact, and how they react to things.

One of the things I loved about working on 'Portal' was that we'd get emails from people saying, 'I love to play first-person shooters but my girlfriend won't play them with me. But I got her to play 'Portal' and she had a blast.'

I think different games have a different chemical release in your brain as far as reward goes. I like making puzzle games, just because I know I'm kinda good at it, and they really are superfun to work on.

Games can be art, and they can be significant and all the glorified things that we want them to be. But if you ask a kid if their toys are important, they'll say 'yes,' and 'Please don't take them away.'

I was the lead designer on 'Portal,' and I really enjoyed making that type of game.

I started working at Airtight Games after I shipped 'Left 4 Dead 2' back in 2009.

I can't really change the games I like to make, and I can't change my own particular aesthetic.

I'd been at Valve since I got out of college. I felt like I kind of grew up there, and I wanted to see what else was out in the world. One of the owners of Airtight Games is a friend of mine, and he asked if I would run a team there. It just sounded like a great opportunity.

I love humorous games. I love to laugh, and I think it's a really great way to attract players.