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.
Adventure game
Further, the improvements in digital distribution led to the concept of episodic adventure games, delivering between three and five "chapters" of a full game over a course of several months via online storefronts, Steam, Xbox Live Marketplace, PlayStation Store, and Nintendo eShop. Modeled off the idea of televisions episodes, episodic adventure games break the story into several parts, giving players a chance to digest and discuss the current story with others before the next episode is available, and further can enhance the narrative by creating cliffhangers or other dramatic elements to be resolved in later episodes. The first major successful episodic adventure games were those of Telltale Games, a developer founded by former LucasArts employees following the cancellation of "Sam & Max: Freelance Police". Telltale found critical success in "The Walking Dead" series released in 2012, which eschewed traditional adventure game elements and puzzles for a strong story and character-driven game, forcing the player to make on-the-spot decisions that would become determinants and affect not only elements in the current episode but future episodes and in sequels. The game also eschewed the typical dialog tree with a more natural language progression, which created a more believable experience. Its success was considered a revitalization of the genre, and would lead Telltale to produce more licensed games driven by story rather than puzzles.In the midst of releasing "", the company was forced to initiate a "majority studio closure" after their last investor had pulled out of funding. Telltale announced on September 21, 2018, that it had let go of all but 25 of its staff as part of this closure, with the remaining skeleton crew completing specific obligations, such as finishing the "Minecraft: Story Mode" project porting to Netflix. Telltale Games filed for bankruptcy in November 2018.