The Hobbit: A Software Adventure

The other characters can make their own moves independently of the player and their actions can sometimes result in a situation where it is not possible to complete the game. Every character and object in the game has a calculated mass which affects how they can be manipulated by the player. The implementation is rich enough that you can play entirely without pictures if you wish. Also, gameplay happens in realtime, uncommon for interactive fiction. The game's parser, called Inglish took as long to develop as the rest of the game. In contrast to other text-based games of the period which were based on simple verb-noun parsers, Inglish allowed for complete sentences to be entered.