What was the first adventure game?
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.
Bonk's Adventure
Bonk's Adventure is a 2D platform video game developed by Red Company and Atlus as the first game in the Bonk series that was released in 1989 in Japan and 1990 in North America for the TurboGrafx-16. In Japan it was released as in 1989, a play on the Japanese name for the system, 'PC Engine'. The game was re-released for the TurboGrafx-16 in the U.S. in 1992 on the "Gate of Thunder" 4-in-1 game CD-ROM. The game was later ported to the NES, Amiga and arcade systems under different titles (FC Genjin and BC Genjin). A completely different game with the same name appeared on the Game Boy (under the title GB Genjin in Japan). It is also available through Nintendo's Virtual Console service, on the PlayStation Store and there is a version for mobile phones in Japan.