was The Fantasy Trip. The first such module was Death Test, published in 1978. Eight adventures were released in total. One thing that set them apart was the need for miniatures and a hexmap, in order to take advantage of the combat and movement systems. These adventures were also very popular and influential. Meanwhile, several third-party publishers started to publish solitaire adventures meant for use with popular roleplaying systems. Some of the earliest adventures in this vein were The Solo Dungeon (1978) by British author Richard Bartle, and Survival of the Fittest (1979), published by Judges' Guild in the United States. Both of these adventures were meant to be used with Dungeons & Dragons rules. Solitaire role-playing adventures also experienced a boom in the 1980s. Many role-playing rulesets included solo adventures which were intended to teach the rules systems to the players. Some companies released lines of solitaire adventures for their own games. Examples of games with prolific solitaire lines were Dungeons & Dragons, GURPS, Das Schwarze Auge, DC Heroes, and Call of Cthulhu. Some third-party publishers continued to release solo adventures for established RPG systems (including Judges' Guild, who released solos for Advanced Dungeons & Dragons). Solitaire adventures were also featured quite frequently in professional RPG magazines and fanzines. Several solo adventures (such as those for Tunnels & Trolls, Dungeons & Dragons, and Das Schwarze Auge) were translated into other languages. As was the case with other types of gamebooks, the production of solitaire RPG adventures decreased dramatically during the 1990s. However, new solos continue to be published to this day. Some companies continue to produce solo adventures for Tunnels & Trolls. There are also new solo adventures for a variety of systems, and even some influenced by the Fantasy Trip solos (such as the ones by Dark City Games). The Internet has provided a channel to distribute solitaire adventures, with both free and commercial adventures made available as electronic documents. Adventures Adventure gamebooks incorporate elements from Choose Your Own Adventure books and role-playing solitaire adventures. The books involve a branching path format in order to move between sections of text, but the reader creates a character as in a role-playing game, and resolves actions using a game-system. Unlike role-playing solitaire adventures, adventure gamebooks include all the rules needed for play in each book. Adventure gamebooks are usually not divided into numbered pages, but rather into numbered sections of