The history of role-playing games begins with an earlier tradition of role-playing, which combined with the rulesets of fantasy wargames in the 1970s to give rise to the modern role-playing game. A role-playing game (RPG) is a type of game in which the participants assume the roles of characters and collaboratively create stories. Participants determine the actions of their characters based on their characterization, and the actions succeed or fail according to a system of rules and guidelines. Within the rules, they may improvise freely; their choices shape the direction and outcome of the games.
Role-playing games are substantially different from competitive games such as ball games and card games. This has led to confusion among some non-players about the nature of fantasy gaming.
Role-playing games are often poorly understood by the non-gaming community, and have attracted criticism from concerned parents and religious conservatives. Read more: http://en.wikipedia.org/wiki/History_of_role-playing_games