High Quality Content by WIKIPEDIA articles! David Lance "Dave" Arneson (October 1, 1947 – April 7, 2009) was an American game designer best known for co-developing the first published role-playing game (RPG), Dungeons Dragons, with Gary Gygax, in the early 1970s. Arneson`s early work was fundamental to the development of the genre, developing the concept of the RPG using devices now considered to be archetypical, such as adventuring in "dungeons", using a neutral judge, and having conversations with imaginary characters to develop the storyline.