Together with the Institute for the Future of the Book I produced this website as a way to think about games. We released Version 1.1 back in 2006. Based on the many thoughtful and careful comments people made on it, I revised Gamer Theory and came up with Version 2.0, which is available here. Comments on Version 1.1 are now closed, but we welcome comments and discussion here at Version 2.0. Together with the Institute for the Future of the Book, I thought it would be interesting to make Version 2.0 of my book Gamer Theory available for people who would like to visualize it. So now we have a Version 2.0 here on the web that people can comment on, and a Version 2.1 in print form from Harvard University Press for people who like a well designed and elegantly produced artifact, and we also have what I think of as Version 3 of Gamer Theory — the visualizations. These pose the question of what digital technology can bring to the presentation of text.