Garry Garrett's Homepage AD&D is a role playing game set in the mythical universe created by J.R.R. Tolken in his books The Hobbit and the Lord of the Rings trillogy augmented with mythology from a number of classical sources.
Participants play humans, elves, dwarves, etc. in a world inhabited by Dragons, and Trolls, etc. AD&D has been the subject of a bit of contraversy in that of the millions of people who have played the game, a handful of people who weren't all that mentally stable in the first place, lost their "astetic distance" and have confused this game with reality. Quite frankly, if AD&D had not been there, these same people would have read Catcher in the Rye or some other otherwise benighn work and have gotten equally as wacked out on that. If AD&D does have any kind of problem it is that, like most Role Playing Games, it's popular with kids, and generally kids play with other kids (and not with any adults present who are following along with the plot), and being in a "fairy tale" setting (and as we all know, fairy tales were orginally made up to teach values and morals to kids), you tend to have the blind leading the blind in issues of morals and values. If you are afraid of what your kids might learn from playing AD&D, play it with them (preferably as the Game Master, thus you get to create the storyline to a large extent).