The object of the game is to write a story, using only one word at a time. The story doesn't need to be cohesive or have any sort of plot or make sense in any way, but it should be made up of more-or-less coherent sentences. When someone feels they've come to the end of a sentence, just put a period/exclamation point/question mark after your word.

Example:

Person 1: Once

Person 2: Upon

Person 3: A

Person 4: Time

Person 5: There

Person 6: Was

Person 7: A

Person 8: Castle.