Susana Tosca was todays guest lecturer at my course in computer game criticism. She talked about the work of the IT-university of Copenhagen's school of computer game studies which Lisbeth Klastrup, Jesper Juul and herself did in investigating the virtual world of Everquest. This study was presented at the Tampere conference earlier this year. From this study we turned to a fruitful discussion of the principles on how to study computer games and how to make computer game criticism.