The Colossal Cave Adventure game was originally written by Will Crowther in 1975 at BBN. The version available on our TOPS-20 system was modified by Don Woods at the Stanford AI Lab in 1977. You explore a small world and gain points by solving puzzles.
This version is also available on the IBM 4361.
A complete transcription from FORTRAN into C was done for the version on the decdatasystem 570