and persistence to this basic idea with additions such as game facilitators and rules of interaction. Participants in a role-playing game will generate specific characters and an ongoing plot. A consistent system of rules and a more or less realistic campaign setting in games aids suspension of disbelief. The level of realism in games ranges from just enough internal consistency to set up a believable story or credible challenge up to full-blown simulations of real-world processes. Tabletop role-playing games may also be used in therapy settings to help individuals develop behavioral, social, and even language skills. Beneficiaries commonly include young people with learning difficulties such as Autism spectrum disorders, attention-deficit hyperactive disorder (ADHD), and dyslexia. Varieties Role-playing games are played in a wide variety of formats, ranging from discussing character interaction in tabletop form, physically acting out characters in LARP to playing characters virtually in digital media. There is also a great variety of systems of rules and game settings. Games that emphasize plot and character interaction over game mechanics and combat sometimes prefer the name storytelling game. These types of games tend to reduce or eliminate the use of dice and other randomizing elements. Some games are played with characters created before the game by the GM, rather than those created by the players. This type of game is typically played at gaming conventions, or in standalone games that do not form part of a campaign. Tabletop Tabletop and pen-and-paper (PnP) RPGs are conducted through discussion in a small social gathering. The GM describes the game world and its inhabitants. The other players describe the intended actions of their characters, and the GM describes the outcomes. Some outcomes are determined by the game system, and some are chosen by the GM. This is the format in which role-playing games were first popularized. The first commercially available RPG, Dungeons & Dragons (D&D), was inspired by fantasy literature and the wargaming hobby and was published in 1974. The popularity of D&D led to the birth of the tabletop role-playing game industry, which publishes games with many different themes, rules, and styles of play. The popularity of tabletop games has decreased since the modern releases of online MMO RPGs. This format is often referred to simply as a role-playing game. To distinguish this form of RPG from other formats, the retronyms tabletop role-playing game or pen and paper role-playing game are sometimes