A map of The Hobbit
The Hobbit (1982) was an adventure game that influenced the genre in many ways. It attempted to give game characters a degree of articifial intelligence. They could roam through the world freely, and even attack each other, sometimes leading to the game becoming unwinnable.
The map to one of the most famous games in text adventure gaming history, The Hobbit, is now available as a Trizbort.io sample map.