What is the name of the American game designer who co-developed Dungeons & Dragons Basic Set and who developed the concept of the RPG?
Dungeons &amp; Dragons Basic Set:  First published in 1977, it saw a handful of revisions and reprintings. Dungeons &amp; Dragons Basic Set:  The first edition was written by J. Eric Holmes based on Gary Gygax and Dave Arneson's original work.
i don't know