I Didn't Know You Could Yodel

This game manages to be offensive on almost every level without being actually obscene. If you want to play a game based on massive diarrhea, being rude to your mother, offensive racial stereotypes (including Injun Jim and Italian and Mexican characters who add 'o' after every word), sexism, entering giant bodily orifices, senseless murder, and random drug use, this is the game for you.

The parser itself does an okay job of recognizing commands, but it has some actually brilliant innovations, like little popup windows that tell you what's going on elsewhere, and a great implementation of hangman. But why its put in as an implementation of an childish and offensive BIG game whose favorite puzzle form is the obscure riddle is beyond me.