To play the Opposite Game, start with a word, any word at all. (If you can’t decide on a word, start with “daylight.")
Declare the opposite of that word by writing, "The opposite of ... is ..." and fill in the opposite of that word.
Then take the last word you have written and declare it's opposite, writing it all out carefully. "The opposite of ... is ... "
End up with a meandering chain of opposites that fill up a page.
Give your work a title and write the date on the page.
Here is a more detailed version of these directions.