Gary Gygax in the context of "Chainmail (game)"

Dungeons & Dragons (commonly abbreviated as D&D or DnD) is a fantasy tabletop role-playing game (TTRPG) originally created and designed by Gary Gygax and Dave Arneson. The game was first published in 1974 by Tactical Studies Rules (TSR). It has been published by Wizards of the Coast, later a subsidiary of Hasbro, since 1997. The game was derived from miniature wargames, with a variation of the 1971 game Chainmail serving as the initial rule system. D&D's publication is commonly recognized as the beginning of modern role-playing games and the role-playing game industry, which also deeply influenced video games, especially the role-playing video game genre.

D&D departs from traditional wargaming by allowing each player to create their own character to play instead of a military formation. These characters embark upon adventures within a fantasy setting. A Dungeon Master (DM) serves as referee and storyteller for the game, while maintaining the setting in which the adventures occur, and playing the role of the inhabitants of the game world, known as non-player characters (NPCs). The characters form a party and they interact with the setting's inhabitants and each other. Together they solve problems, engage in battles, explore, and gather treasure and knowledge. In the process, player characters earn experience points (XP) to level up, and become increasingly powerful over a series of separate gaming sessions. Players choose a class when they create their character, which gives them special perks and abilities every few levels.

In fantasy fiction, a lich (/lɪtʃ/) is a type of undead creature with magical powers.

Various works of fantasy fiction, such as Clark Ashton Smith's "The Empire of the Necromancers" (1932), had used lich as a general term for any corpse, animate or inanimate, before the term's specific use in fantasy role-playing games. The more recent use of the term lich for a specific type of undead creature originates from the 1976 Dungeons & Dragons role-playing game booklet Greyhawk, written by Gary Gygax and Rob Kuntz.

David Lance Arneson (/ˈɑːrnɪsən/; October 1, 1947 – April 7, 2009) was an American game designer best known for co-developing the first published role-playing game (RPG), Dungeons & Dragons, with Gary Gygax, in the early 1970s. Arneson's fundamental early role-playing game (RPG) genre work pioneered now-archetypical devices, such as: cooperative play to develop a storyline instead of individual competitive play to "win"; and adventuring in dungeon, town, and wilderness settings as presented by a neutral judge who doubles as the voice and consciousness of all characters aside from the player characters.

Arneson discovered wargaming as a teenager in the 1960s, and he began combining these games with the concept of role-playing. He was a University of Minnesota student when he met Gygax at the Gen Con gaming convention in the late 1960s. In 1971, Arneson created the game and fictional world that became Blackmoor, writing his own rules and basing the setting on medieval fantasy elements. Arneson took the game to Gygax as the representative for game publisher Guidon Games, and the pair co-developed a set of rules that became Dungeons & Dragons (D&D). Gygax and Donald Kaye subsequently founded Tactical Studies Rules in 1973, which published Dungeons & Dragons the next year.

TSR, Inc. was an American game publishing company, best known as the original publisher of Dungeons & Dragons (D&D). Its earliest incarnation, Tactical Studies Rules, was founded in October 1973 by Gary Gygax and Don Kaye. Gygax had been unable to find a publisher for D&D, a new type of game he and Dave Arneson were co-developing, so he founded the new company with Kaye to self-publish their products. Needing financing to bring their new game to market, Gygax and Kaye brought in Brian Blume in December as an equal partner. Dungeons & Dragons is generally considered the first tabletop role-playing game (TTRPG), and established the genre. When Kaye died suddenly in 1975, the Tactical Studies Rules partnership restructured into TSR Hobbies, Inc. and accepted investment from Blume's father Melvin. With the popular D&D as its main product, TSR Hobbies became a major force in the games industry by the late 1970s. Melvin Blume eventually transferred his shares to his other son Kevin, making the two Blume brothers the largest shareholders in TSR Hobbies.

TSR Hobbies ran into financial difficulties in the spring of 1983, prompting the company to split into four independent businesses, with game publishing and development continuing as TSR, Inc. (TSR). After losing their executive positions, the Blume brothers subsequently sold their shares to TSR Vice President Lorraine Williams, who in turn engineered Gygax's ouster from the company in October 1985. TSR saw prosperity under Williams, but encountered financial trouble in the mid-1990s. While their overall sales and revenue were healthy, TSR's high costs meant the company nevertheless became unprofitable and deeply in debt. TSR was left unable to cover its publishing costs due to a variety of factors. Facing insolvency, TSR was purchased in 1997 by Wizards of the Coast (WotC). WotC initially continued using the TSR name for D&D products, but by 2000, the TSR moniker was dropped, coinciding with the release of the 3rd edition of Dungeons & Dragons.

The lich /lɪtʃ/ is an undead creature found in the Dungeons & Dragons (D&D) fantasy role-playing game. Liches are spellcasters who seek to defy death by magical means.

The term derives from lich, an archaic term for a corpse. Dungeons & Dragons co-creator Gary Gygax stated that he based the description of a lich included in the game on the short story "The Sword of the Sorcerer" (1969) by Gardner Fox.

Greyhawk is a rules supplement written by Gary Gygax and Robert J. Kuntz and published for the original edition of the Dungeons & Dragons (D&D) fantasy role-playing game. It has been called "the first and most important supplement" to the original D&D rules. Although the name of the book was taken from the home campaign supervised by Gygax and Kuntz based on Gygax's imagined Castle Greyhawk and the lands surrounding it, Greyhawk did not give any details of the castle or the campaign world; instead, it explained the rules that Gygax and Kuntz used in their home campaign, and introduced a number of character classes, spells, concepts and monsters used in all subsequent editions of D&D.