Crowther and Woods' Adventure is the granddaddy of all interactive fiction. Originally written by Will Crowther in his spare time at BBN, it made its way onto the fledgling ARPAnet, where it was discovered by Don Woods at the Stanford AI Lab. With Crowther's permission, Woods expanded the game to encompass more than double the number of rooms and puzzles. Adventure has been translated, ported, and imitated hundreds of times in the 36 years since its creation.
This particular version of Adventure was written by Arthur O'Dwyer in C, closely following a version written by Don Knuth in CWEB, which in turn was based on Crowther and Woods' original Fortran source code.