This is a very simple game.
The first person posts a word. Just one.
Then the next person posts that word, and adds another.
Then the next person posts those two words, and adds yet another.
This continues until someone along the chain decides that the sentence should end, and adds a period to the end of their word.
Then it starts over again!
Example:
Person 1: The
Person 2: The cat
Person 3: The cat was
Person 4: The cat was sad
Person 5: The cat was sad because
Person 6: The cat was sad because of
Person 7: The cat was sad because of reasons.
Once