Very nice! Thanks for doing this.
Nice graphic - some suggestions for things to add:Unearthed Arcana - 1985Dungeons and Dragons Cartoon - September 1983 to December 19852nd Ed. Players' Options Books (black covers) - 1995 History of Gen Con http://blog.genconhistory.com/search/label/timelineIntroduction of Major Campaign SettingsPathfinder - 2008 This especially is a milestone imo. D&D has always had competitors, but never one that was so directly a descendant of D&D itself and which competed so closely against D&D.
Thanks these are all good ideas for version 1.1
Please add a year to each entry you have on this table. It's the only thing missing from what is otherwise a great visual reference.
That's pretty cool. I like it.