Open world
There is no consensus on what the earliest open world game is, due to differing definitions of how large or open a world needs to be. Ars Technica traces the concept back to the free-roaming exploration of 1976 text adventure game "Colossal Cave Adventure", which inspired the free-roaming exploration of "Adventure" (1980), but notes that it wasn't until 1984 that what "we now know as open-world gaming" took on a "definite shape" with 1984 space simulator "Elite", considered a pioneer of the open world; Gamasutra argues that its open-ended sandbox style is rooted in flight simulators, such as SubLOGIC's "Flight Simulator" (1979/1980), noting most flight sims "offer a 'free flight' mode that allows players to simply pilot the aircraft and explore the virtual world". Others trace the concept back to 1981 CRPG "", which had a free-roaming overworld map inspired by tabletop RPG "Dungeons & Dragons". The overworld maps of the first five "Ultima" games, released up to 1988, lacked a single, unified scale, with towns and other places represented as icons; this style was adopted by the first three "Dragon Quest" games, released from 1986 to 1988 in Japan.
List of video game genres
Because they put little pressure on the player in the form of action-based challenges or time constraints, adventure games have had the unique ability to appeal to people who do not normally play video games. The genre peaked in popularity with the 1993 release of "Myst", the best-selling PC game of all time up to that point. The simple point and click interface, detailed worlds and casual pace made it accessible, and its sense of artistic surrealism caused news outlets such as "Wired Magazine", "The New York Times" and the "San Francisco Chronicle" to declare that the gaming industry had matured. It had four proper sequels, but none managed to experience the same level of success. The success of "Myst" also inspired many others to create similar games with first person perspectives, surreal environments and minimal or no dialogue, but these neither recaptured the success of "Myst" nor of earlier personality-driven adventures.