Which company was this American game designer who designed the set of Planescape Campaign Setting employed for more than a decade?
David Cook (game designer) David "Zeb" Cook is an American game designer, best known for his work at TSR, Inc., where he was employed for over fifteen years.
Jon Pickens Jon Pickens is an American game designer and editor who has worked on numerous products for the "Dungeons & Dragons" fantasy role-playing game from TSR and later Wizards of the Coast.