Colossal Cave | Classic retro game for the Commodore PET Computer (1976)

Also named ADVENT or Colossal Cave AdventureColossal Cave Adventure, often referred to simply as Adventure, is a text-based interactive fiction game originally created by Will Crowther in 1976 and later expanded by Don Woods in 1977. Don Woods, a programmer at Stanford University, added more complex puzzles and fantasy elements to Crowther's original cave exploration game. The game was inspired by the real-life Mammoth Cave system in Kentucky and became a foundational title in the history of interactive fiction and video games.

Jim Butterfield, a well-known figure in the Commodore PET community, was involved in porting and adapting various software for the Commodore PET, but he is not directly credited with writing or publishing Colossal Cave Adventure. The game was widely distributed and adapted for many platforms, including the Commodore PET, but its original authors remain Will Crowther and Don Woods.

The game's premise involves exploring a vast cave system, solving puzzles, and collecting treasures. It uses a text parser interface where players type commands to interact with the environment. Colossal Cave Adventure is considered a pioneering work in the adventure game genre and has influenced countless games that followed. Its legacy is tied to the early days of computer gaming and the evolution of interactive storytelling.