What Does Adventure Mean?

Colossal Cave Adventure, also known as ADVENT or simply Adventure, is an early computer game written in a command-line format that represented the most modern technology at the time. In Colossal Cave Adventure, the player enters simple commands into a command-line prompt, and the computer moves the player around within a virtual world corresponding to a series of caves in the state of Kentucky.

Techopedia Explains Adventure

Colossal Cave Adventure was designed by Will Crowther in the late 1970s. It was written in the FORTRAN coding language, and took up about 300 kB of core memory. A later more developed version of the game swelled to about 3000 lines of code representing 140 map locations, nearly 300 vocabulary words, and a variety of “treasure objects.” Colossal Cave Adventure was made for a 36-bit PDP-10 machine.